Lot 50011 – Bechuanaland Protectorate – 1888, “Protectorate” overprint, unique assembly

Bechuanaland Protectorate – 1888, “Protectorate” overprint, a unique assembly including a highly valuable copper plate (very rarely encountered in the Sperati production artifacts), a die proof on pelure paper and six additional die proofs on two different medium wove papers, including one composite with two overprints; only one die proof (ex Walske) and a matrix were recorded in the Postal Museum in Paris; Bechuanaland is unlisted in the Sperati I.