Sale No: 372
Lot No:1953
Symbol:cvr
Cat No:473, 476
Bulgaria, Michel 473, 476 cover, Registered Air mail cover to USA sent 21.7.1948 franked with 10 on 100 L and 100 L. Mi 473 is PERFORATED in spite of information in all known catalogues, even specialized Bulgarian ones. This stamp is only known imperforated. (Image1)