Stamps that inspired us
Countersign borrows the idea of proof from the post. Every image below is in the public domain; we link each source. Stamps are shown on screen only, never at actual size.
- Michelangelo - Delphic SibylFresco detail · Michelangelo, Sistine Chapel ceiling, 1508–1512 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- LibyanSibyl SistineChapelFresco detail · Michelangelo, Sistine Chapel ceiling, 1508–1512 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Penny-black-stamp-great-britain-circa-1840Stamp · issued 1840 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- "Two Penny Blue" postage stamps MET SF2002 236 2 img1Stamp · issued 1840 · CC0 · checked 2026-10-13Source on Wikimedia Commons
- Penny Red Black Maltese CrossStamp · issued 1841 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Brazil 1843 Mi 1 Sc 1 stamp (Bull's eye)Stamp · issued 1843 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Doppelgenf1Stamp · issued 1843 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Zürich 4Stamp · issued 1843 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Basel Dove unusedStamp · issued 1845 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- 1847 Mauritius One Penny "Post Office" Ball CoverFresco detail · Michelangelo, Sistine Chapel ceiling, 1508–1512 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Stamp US 1847 5cStamp · issued 1847 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- LadymcleodStamp · issued 1847 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- France timbre Cérès 20c noir 1849Stamp · issued 1849 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Bayern-1-la-Schwarzer-Einser-Voll-bis-Breitrandig-Sauber-Gestempelt-Tadellose-Erhaltung-mit-Fotoattest-gestempelt-30-1-07Stamp · issued 1849 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Epaulette 10cStamp · issued 1849 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Hawaiian Missionary 2c and 13c stamps on pieceStamp · issued 1851 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Tuscany6Stamp · issued 1851 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Half anna red Scinde Dawk - WhiteStamp · issued 1852 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Inverted SwanStamp · issued 1854 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- 1855ca 4d twice CoGH Yv4 Mi2IYb SG6Stamp · issued 1855 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Gul tre skilling bancoStamp · issued 1855 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Russia 1857 used pen cancelStamp · issued 1857 · Public domain · checked 2026-10-13Source on Wikimedia Commons
- Inverted JennyStamp · issued 1918 · Public domain · checked 2026-10-13Source on Wikimedia Commons
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