April 2, 1974
Stockholmia 74
Booklet Pane of 4 nos of commemorative postage stamps on the Stockholmia 74, Philatelic Exhibition, Stockholm : Issued by Sweden Issued on Apr 2, 1974 Issued for : Stockholmia 74, philatelic exhibition, Stockholm, held on Sept. 21-29, Picture : UPU Type of 1924 Colour : 20o – Green, 25o –
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