The World's First Postage Stamp Could Reach $8.25 Million at Auction – Robb Report

This particular 1840 Penny Black is the world’s first postage stamp. It is expected to fetch up to $8.25 million at Sotheby's in December.

Project Mercury Postage Stamp — Little Postage House

Penny Black, the world's first postage stamp, expected to fetch over $8 mn at London auction - The Economic Times

4527 - 2011 First-Class Forever Stamp - Space Firsts: Alan B. Shepard - Mystic Stamp Company

Sotheby's to Offer the World's First Postage Stamp: The First Penny Black, Press Release

The World's First Postage Stamp Could Reach $8.25 Million at Auction – Robb Report

FDCs of Commemorative Stamps Issued 1974, Scott 1504-1552. Cheap. Deep discount prices.

Penny Black, the world's first postage stamp, expected to fetch over $8 mn at London auction - The Economic Times

The World's First Postage Stamp in NFT

World War II “Millions Uprooted” Gold Stamp Replica 9/2/1995 First Day Issue

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4748a - 2013 First-Class Forever Stamp - Modern Art in America: Charles Demuth's I Saw the Figure 5 in Gold

R242 - 1917-33 $3 US Internal Revenue Stamp - engraved, violet - Mystic Stamp Company

World's first Penny Black stamp could fetch £6 million at Sotheby's

File:Project Mercury 4¢ US Postage stamp February 20, 1962 FDC Scott -1193.jpg - Wikipedia

World's First Postage Stamp Goes Up for Auction

World's first Penny Black stamp could fetch £6 million at Sotheby's