Lot 60145 – 1924 Provisionals specialised collection mounted on 33 exhibition pages with a majority of the rare varieties and usages

Bulgaria: 1924 Provisionals specialised collection mounted on 33 exhibition pages with a majority of the rare varieties and usages including a block of nine of Michel N°180A, many inverted overprints, a very rare « Postsparbuch », imperforate in-between, overprinted se-tenant with not overprinted, etc.