This stamp shows us as given by Stanley Gibbons DIE FREGATTA the Bulgarian sources give “pirate fregata”. If she ever has floated on the water I don’t believe, She was used as a bar-restaurant on Sunny Beach n.e. of Burgas. I don’t have much on her, but on the stamp, she is placed on the beach, most probably built there, when ?.
The only thing on her history I have is her fate: In 2013 she got on fire and was a total loss. If she was rebuilt I don’t believe so.
Bulgaria 1968 10s sg 1799, scott1685.