SG434/ 437 1929 PUC - OFFICIAL LONDON CONGRESS envelope, "used" on FIRST DAY of ISSUE May.10.29.

SG434/ 437 1929 PUC - OFFICIAL LONDON CONGRESS envelope, "used" on FIRST DAY of ISSUE May.10.29.
Stock Number: 314742
Availability: In Stock
Catalogue Number: 302
SG Number: SG437
Price: £375.00
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SG434/ 437 1929 PUC - OFFICIAL LONDON CONGRESS envelope, "used" on FIRST DAY of ISSUE May.10.29.

Unusual and scarce.