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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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<p>1937-38 Air 6c blue IMPERFORATE proof block of four from right of sheet, unmounted o g; Insignificant wrinkles mentioned for accuracy, still very fine. Only 75 pairs existed, with blocks now rare. Sanabria handstamp on reverse. SG 371var</p>

1937-38 Air 6c blue IMPERFORATE proof block of four

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Investment portfolio, formally belonging to J A Clower (deceased) C179883

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1937-38 Air 6c blue IMPERFORATE proof block of four

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