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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>1929 ½d Green Postal Union Congress (Wmk. sideways). Superb unmounted o.g imperforate block of four imprimaturs with 23mm gutter margin from the sideways coil printing with "BPMA" handstamps on reverse. Scarce. SG 434a.</p>

Great Britain 1929 ½d Green Postal Union Congress, Block of Four, BPMA Imprimatur, SG 434a

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Margin Scheme

Great Britain 1929 ½d Green Postal Union Congress, Block of Four, BPMA Imprimatur, SG 434a

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