In general, the evaluation is only visual and does not concern sound quality.
The sound quality is very good at best even the cards are in perfect condition.
Rare Polish flexi / playing postcard ( 10x14 cm), ORIGINAL 1966 issue Visualy graded ( not play tested! ) .....unused, NOS copy
actually the card come from the inventory of the former seller, certainly the postcard have never been played, but may have slight signs of storage for over 50 years