#1615 7.9c Drum-Dull Gum, Coil Line Pair [10] Mint **ANY 5=FREE SHIPPING** | eBay
2170 Dr. Paul White, American Physician, Block Tagging, Dull Gum | Dennis R. Abel - Stamps for Collectors, LLC
US 1305E MNH VF 15 Cent Oliver Wendell Holmes Dull Gum Type II CV$1.50 | United States, Back of Book (Other) - Proofs & Essays - Essays Stamp / HipStamp
US J90 MNH VF 2 Cent Postage Due - Dull Gum | United States, Postage Due Stamp / HipStamp
Scott #O136 22c Official Mail Coil Pairs RARE Dull Gum, Low Gloss Cat $132.00 | eBay
82-2.2x, 1982 U.S. National Christmas Seals Sheet, pm F, dull gum
2189 US 52c Hubert Humphrey MNH PB #1 dull gum | United States, General Issue Stamp / HipStamp
Scott # 1393a Booklet Pane Dull Gum MNH – The Itty Bitty Stamp Company
J89 1¢ Postage Due, Dull Gum | Dennis R. Abel - Stamps for Collectors, LLC
#1617a 10c Justice-Dull Gum, Gap Pair [2] Mint **ANY 5=FREE SHIPPING** | eBay