NO. It's only a nice "Souvenir Card". Why ? Because as per FIP Rules a maximum card must coply with three conditions : concordance of (1) Subject, (2) Place, and (3) Time. Whilst no. 1 & 3 conditions are met , the no.2 condition NOT ! Because in Berlin there was not ( and there is not) a PORT where a navy submarine can call at ! So what we have here is only a nice "Souvenir Card " and not a Maximum Card !

Hi, does you sell or exchanges maximum cards from germany/DDR? best regards manni55