- Peculiar Stamp Issuing Entities
- Vended Stamps
- 3D Lenticular & Holograms - Depth, Motion, view Crosseyed & Anaglyphs (you need glasses).
- Metallics & Glossy Inks, Laquers & Foils
- Precious Metals and Jewels
- Odd Shapes and Perforation Methods
- Weird Papers, Cardboard, Cloth, Plastic & Wood (for metals, see above)
- Embossed & Bas-relief
- Glowing & Heat Sensitive
- Sounds & Smells
- Hidden Images - Microprinting, Scratch-off & Win
- Joint Issues (two countries on one issue)
- Errors, Varieties, Proofs and Miscellany
- You sell - we buy
- You want - We'll look for...
Odd shaped stamps on cover.
USA Love Set of 2, Heart-shaped die cut stamps on cover to Germany.
Scott 3274 from booklet and 3275 (55-cent) from sheetlet of20 stamps. Two 33-cent stamps are paired on the cover, inside the carrier frames that comprised the booklet pane with the marginal markings. Scarce as set on one, non-FDC cover. Good contemporaneous usage.