Stamps and Postal History of the World

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A H Baldwin & Sons Ltd has a history that dates back to 1872, and is one of the largest and longest established numismatic dealers and auction houses in the world. As a distinguished name in the numismatic trade, they have seamlessly transitioned into the world of bullion, bringing unparalleled expertise and commitment to quality to a broader audience.

Established in 1872, Baldwin's has been a cornerstone of the numismatic trade, earning a reputation for integrity, authenticity, and a passion for the rare and precious. For over a century and a half, we have been at the forefront of preserving and promoting the art and history encapsulated within rare coins and precious metals.

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1931 Air, master die proof (undenominated frame) in black and grey (as used for the 3pi value) on "SG" wmkd paper (62x50mm), numbered "6" in pencil at lower left. Fine and rare. SG 49b/57d

1931 Air, master die proof (undenominated...

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Spink Collector's Series and Pitts North America

Zero Rated

1931 Air, master die proof (undenominated...

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