Great Britain 1929 1½d Red Brown "Postal Union Congress" imprimaturs, SG436.
The superb unmounted original gum imperforate tête-bêche pair of advertising booklet panes from the Post Office registration sheet with "NPM IMPRIMATUR" handstamp on reverse.
Ex. National Postal Museum Archive sale
A unique piece in uncirculated condition from the first approved printing sheet.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.