United States

RW49, Mint VF Sheet of 30 $7.50 Duck Stamps Scarce! - Stuart Katz

$279.95

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1435a, Amazing Black Color Shift Error Sheet of 50 Stamps WoW - Stuart Katz

$1,880.00

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1861, 20¢ Misperfed ERROR Plate Block Of Six Small And Big Stamps - Stuart Katz

$56.40

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1470b, Black & Deep Red Colors Omitted ERROR VF NH - Stuart Katz

$705.00

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632//42 Var, MNH With Four Gum Breakers Blocks of Four - RARE SET - Stuart Katz

$750.00

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2182, Scarce Fold Over ERROR Makes For Large Selvage WoW - Stuart Katz

$70.50

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2238a, Large Solvent Smear ERROR On Plate Block of 6 Stamps - Stuart Katz

$70.50

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807, SIX Misperforated ERROR Plate Blocks RARE Offering! - Stuart Katz

$465.30

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1716, Large Misperfed ERROR Plate Block Mint NH 13¢ Lafayette - Stuart Katz

$61.10

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1919a, Denominations Missing and Doubled on ERROR Plate Block of 8 Stuart Katz

$705.00

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5052b, Color Omitted and Imperforate ERROR Pair - Flag Stamp - Stuart Katz

Custom Sku: SK-11931

$235.00

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655, MNH 2¢ Edison Light Plate Block of Four Stamps Cat $50.00 - Stuart Katz

$25.00

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3205, TEN SHEETS 32¢ Sylvester and Tweety Sheet With 10th Stamp Imperforate

Custom Sku: SK-11604

$59.95

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1818, Misperforated ERROR Strip of Ten Stamps 18¢ "B" - Stuart Katz

$47.00

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2107, MNH 20¢ Madonna & Child Misperforation ERROR Zip Block of 4 - Stuart Katz

$56.40

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2479b, VF NH Color Omitted MAJOR ERROR 19¢ Fawn Stamp - Stuart Katz

$277.30

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O83, Mint HR 1¢ War Department Official Stamp Cat $240.00 - Stuart Katz

$75.00

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1841a, MNH 15¢ Misperforation Change of Design ERROR Block of 4 - Stuart Katz

$47.00

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2134a MNH XF 14¢ Ice Boat Imperforate Strip of 4 ERROR Cat $160.00 Stuart Katz

$103.40

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2011, MNH 20¢ With Reverse Print Under Gum ERROR With Normal - Stuart Katz

$47.00

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4084, VERY RARE Misperforated Super Heroes ERROR Sheet - Stuart Katz

$611.00

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4481d, Die Cutting Omitted ERROR Pane of Evergreen Stamps - Stuart Katz

$329.00

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1716, MNH 13¢ With Reverse Print Under Gum ERROR With Normal - Stuart Katz

$70.50

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O90, Mint VF OG LH 15¢ War Dept Official Stamp Cat $85.00 - Stuart Katz

$60.00

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550, Mint 5¢ XF NH With Huge Jumbo Margins - PF Certificate - Stuart Katz

$400.00

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1622b, Imperforate Vertical Pair Error - VF Mint NH - Stuart Katz

$211.50

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RW46, Green-winged Teal Federal Duck Stamp VF OG NH - Stuart Katz

Custom Sku: rw46

$9.00

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1941-44 Year Set of 22 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1941-44set

$11.95

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579, Mint NH RARE 2¢ Plate Block of Four Stamps - Cat $1,100.00 - Stuart Katz

$350.00

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RW51, Widgeons Federal Duck Stamp VF OG NH - Stuart Katz

Custom Sku: rw51

$9.00

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R71c, $1 Life Ins With Scratched Plate - Unpriced - Stuart Katz

$35.00

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1966 Year Set of 16 Commemorative Stamps & S/S Mint NH - Stuart Katz

Custom Sku: 1966set

$6.50

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1968 Year Set of 25 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1968set

$8.50

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1958 Year Set of 18 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1958set

$5.50

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1962 Year Set of 18 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1962set

$6.00

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1952 Year Set of 13 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1952set

$5.50

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1953 Year Set of 12 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1953set

$5.50

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1946 Year Set of 6 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1946set

$5.00

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1947 Year Set of 7 Commemorative Stamps & S/S Mint NH - Stuart Katz

Custom Sku: 1947set

$7.50

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1735, 15c "A" Stamp RARE Misperforation ERROR Sheet of 100 Stamps -- Stuart Katz

$376.00

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1945 Year Set of 12 Commemorative Stamps Mint NH - Stuart Katz

Custom Sku: 1945set

$5.50

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2550a, 29¢ Cole Porter Imperforate Strip of 3 Stamps ERROR Mint NH - Stuart Katz

$329.00

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R78a, $1.50 Revenue Superb Four Margin GEM - Stuart Katz

$40.00

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R62a, 50¢ Probate of Will Revenue SUPERB Four Margin Jumbo GEM - Stuart Katz

$70.00

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RW64, $15.00 Canada Goose Federal Duck Stamp VF OG NH -Stuart Katz

Custom Sku: rw64

$24.95

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704-15, VF NH SET OF PLATE BLOCKS Cat $393.00 - Stuart Katz

$275.00

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K10 Rare Used Block of Six Official Stamps $955.00 - Stuart Katz

$400.00

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528B Used Pair with "Shanghai China" Cancel - RARE! - Stuart Katz

$49.95

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679, XF NH Gem Block of Four - 10¢ Nebraska Cat $720.00 - Stuart Katz

$475.00

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2476, Mint NH 1¢ - Misperfed Error Block of Four - Stuart Katz

Custom Sku: SK-04055

$46.89

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1847, Mint NH 4c - MISPERFORATION ERROR BLOCK SHOWS "EE" MARKINGS - Stuart Katz

Custom Sku: SK-04016

$46.89

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619, Mint NH 5c WHOLESALE LOT OF 13 STAMPS - Cat $390.00 - Stuart Katz

$139.88

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1903, RARE PL# 5 COIL STRIP OF 5 Cat $375.00

$202.50

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915b, 5¢ France Partial Reverse Printing of Flag Colors With PFC Stuart Katz

$70.50

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2609b, Mint NH 29¢ FLAG IMPERFORATE BETWEEN ERROR - Stuart Katz

$47.00

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3909d, MNH UNIQUE 37¢ Die Cutting Omitted MAJOR ERROR Pane * Stuart Katz

Custom Sku: 36123

$11,750.00

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509, Mint FVF NH 9¢ Four Blocks of 4 Franklin Stamps CV $400.00 ** Stuart Katz

Custom Sku: SK-32044

$175.00

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2764b, MNH 29¢ 4 Panes All With Black Color Omitted Error PSE - Stuart Katz

Custom Sku: 36785

$423.00

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Q1, MNH 1¢ Parcel Post - 18 Blocks SCV $864 - Stuart Katz

Custom Sku: 40862

$250.00

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538a, Mint NH 1¢ - Imperforate Between Error Pair SCV $125 * Stuart Katz

Custom Sku: 40837

$47.00

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1698b, MNH 13¢ - Olympics Imperforate PL# Block of 12 Stamps Error - Stuart Katz

Custom Sku: 40549

$799.00

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1578a, Mint NH 10¢ Perforation Shift Block of Four Freak Error * Stuart Katz

Custom Sku: SK-30448

$23.45

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1393, MNH 6¢ IKE Perfs Shifted Freaky Error Block * Stuart Katz

Custom Sku: SK-31529

$23.45

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519, Mint NH 2¢ Plate Block of Six - EXTREMELY RARE - SCV $6500 * Stuart Katz

Custom Sku: 38883

$3,500.00

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C6, Mint VF LH 24¢ Early Airmail Stamp CV $65.00 * Stuart Katz

Custom Sku: SK-32019

$45.00

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471, Mint VF NH 10¢ - Rich Color! - Stuart Katz

Custom Sku: 41792

$295.00

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1384 Var, MNH 6¢ Block - Partial Reverse Printing Under Gum Error * Stuart Katz

Custom Sku: 37858

$164.50

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Post Office Murals Pane of 10 Current Rate Postage Stamps Scott 5376a

Custom Sku: SK-5376a

$13.16

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#RN-D9, 2¢ Dark Orange, GOLD NOTE Bank Check,

$100.00

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Stampless Gold Rush Cover Murphy’s California CDS + PAID 10 to King’s Ferry NY 1845-51

$375.00

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6 1/4 Cents Scarce Hale & Co Independent Mail Stampless 1844 New York To Boston

$150.00

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Stampless NY-London Gilpins Exchange Reading Room & Foreign Letter Office 1841

$150.00

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#R97e $15 Mortgage, old paper, used, Scarce Ultramarine shade, ms. ccl. 1869

$410.00

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#272a 8¢ Brown, On Watermarked “USIR” Revenue Paper, Clear “I” In Fluid, Scarce

$595.00

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#RS226e 1¢ powder blue Dr. Soule Rare Experimental Silk Proprietary Revenue M&M

$4,900.00

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#RO17e 1¢ Barber Experimental Silk US Private Die Proprietary Match Revenue M&M

$180.00

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#RS16a 2¢ Vermilion Unique Major Double Transfer Private Die Proprietary Revenue

$1,600.00

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Scarce Foreign Entry of #R117 on #R116 60¢ 1871 Documentary U.S. Revenue POS. 85

$475.00

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Scarce Foreign Entry of #R143 on #R142 60¢ 1871 Documentary U.S. Revenue POS. 34

$420.00

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#R257 $1 Green Liberty US Revenue Series of 1928-29 MOG

$165.00

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#R159 $5 Dark Blue Revenue surcharge reading down in Red on PR121 Newspaper

$325.00

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#RD23 $500 Blue Hamilton Red Serial No. 1748 STOCK TRANSFER NGAI VF-XF Used

$160.00

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#RB13c, 3¢ Orange, Rouletted 6, US Proprietary Revenue 1875-1881

$110.00

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#R91a $5 Mortgage First Issue Revenue 1862 XF Wide Margins Fresh & Clean

$235.00

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#RO182P1 1¢ Black Wilmington Proof US Private Die Proprietary Match Revenue M&M

$250.00

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#R222 $30 Vermilion Liberty US Revenue Series of 1914 MNH OG

$535.00

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#R150 $20 Revenue Orange & black on silk paper, ms. ccl. April 72, used

$750.00

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#R21c 4¢ Playing Cards, deep slate U.S. Revenue SON Railroad Handstamp 1865 Rare

$595.00

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