Rare Buccleuch Block to debut at Boston auction

By AI, Created 6:58 PM UTC, May 15, 2026, /AGP/ – Siegel International will auction the famed Buccleuch Block, the largest known intact block of Britain’s 1840 Two-Pence Blue, for the first time on May 28, 2026, at Boston 2026 World Expo. The stamp rarity is estimated at up to $7.5 million, with the lot headlining a sale of other top philatelic treasures.

Why it matters: - The Buccleuch Block is one of the earliest and rarest surviving postage-stamp multiples, making it a marquee test for the high-end stamp market. - Siegel estimates the block could sell for $5 million to $7.5 million, with president Scott Trepel saying he thinks it could reach at least $10 million. - The sale brings a historically important philatelic object to auction for the first time.

What happened: - Siegel International will offer the Buccleuch Block on May 28, 2026, during Boston 2026 World Expo in Boston. - The auction is scheduled for 4 p.m. at the Boston Convention and Exhibition Center. - The block is the largest known intact block of the Great Britain Two-Pence Blue, issued in 1840 with the One-Penny Black. - The mint block contains 48 stamps depicting a young Queen Victoria.

The details: - Collectors know the item as the “Buccleuch Block,” a name tied to the Scottish noble family that owned it for generations. - The block measures about 10.5 inches wide by 4.25 inches tall, or roughly 27 by 10.5 cm. - It was discovered in 1945, rolled inside a compartment of an old leather traveling writing desk set in Dalkeith Palace. - Alexander Martin, a recently released member of the Royal Air Force and secretary to the 8th Duke of Buccleuch, made the discovery while inventorying the palace contents. - The two blocks found in the desk set sold privately in 1946 for £6,500 through H. R. Harmer Ltd., about $26,000 at the time. - Gordon P. Bailey bought the blocks in that transaction. - The Buccleuch Block later passed through private sales to Renato Mondolfo, then to Hassan Shaida in 1985 through London dealers William and Michael Lea. - Shaida exhibited the block in “Queen Victoria: The Birth of the World’s First Postage Stamps,” which won the Grand Prix National at Stamp World London in 1990. - After that sale, the collection went privately to Guido Craveri and was later listed as on loan from Tito Giamporcaro in the 1996 “Aristocrats of Philately” exhibit at ANPHILEX in New York City. - The current owner is a private collector. - Siegel will also offer an Inverted Jenny stamp estimated at $250,000 to $300,000, a Pony Express envelope estimated at $200,000 to $300,000, and letters carried and signed by Charles Lindbergh on his 1927 nonstop transatlantic flight estimated at $100,000 to $150,000. - The sale catalogue and details are available on the firm’s website.

Between the lines: - The block’s long private chain of ownership has kept it from auction until now, which adds to the attention around its debut. - Trepel framed the discovery as the kind of once-in-a-lifetime find collectors imagine when searching old books, desk drawers and family archives. - Siegel is using the lot to anchor a broader sale of stamp and postal-history rarities, suggesting strong interest beyond a single trophy item.

What’s next: - Bidding will take place in Boston on May 28, alongside the May 23-30 World Expo. - Collectors will get their first public auction chance to compete for the Buccleuch Block. - The outcome will help gauge demand for elite philatelic rarities in a market where condition, provenance and uniqueness drive value.

The bottom line: - A 48-stamp Victorian-era block once bought for $1.92 is heading to auction with multimillion-dollar expectations and a strong chance to reset records for classic postage-stamp rarities.