17th November 1940
Feldpost 'a1' designation etc.

17.11.1940 'a1' desingation reverse.jpeg

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Registered feldpost cover featuring 'a1' designation to the cancel (level position). Ref: 17.11.1940

'FELDPOST' designation letters: a b c d e f g h i j k l m n o, a1etc., Aa etc., Misc.

Feldpost designation letter 'a1', b1', and 'c1' variations

'a1' designation. Level position. Ref: 17.11.1940

'b1' designation. Level position. Ref: 16.07.1941