1918/20, Local Trident Overprints, specialized group of over 500 stamps, mint and used expertly identified by the Bulat catalogue on individual stockcards and classified by types; mostly very fine. 

1918/20, ROMANOV Local Trident Overprints, specialized group of over 100 stamps, mint and used including some multiples, expertly identified by the Bulat catalogue on stockcards, some signed Dr Seichter, with some better items such as Bulat 585 and 599; mostly very fine

1918/20, Local Trident Overprints, specialized group of over 650 stamps, mint and used including complete panes, many expertly identified by the Bulat catalogue, some ex Dr Seichter or Schmidt, also a few fakes (identified as such); an excellent assembly of those difficult issues, with a good prevenance and mostly very fine