An exceptional and highly specialized collection of Romanian stamps, assembled with a clear focus on varieties, errors and advanced philatelic material. This is not a standard accumulation, but a study-oriented collection including multiple versions of the same stamps, highlighting differences in perforation, print, shade and layout. The collection includes: Numerous errors and varieties (print shifts, perforation differences, positional variations) Extensive perforation studies Multiple copies of the same issues for comparison and specialization Several Pro Patria souvenir sheets Scarce and desirable items such as: Majadahonda souvenir sheet Moscow Well-organized album pages, as shown in the attached overview Condition is mixed, as expected for such a complex and study-based collection Please review all photos carefully — they are an integral part of the description. A rare opportunity to acquire a ready-made specialized Romanian collection with strong potential for further development or breakdown resale.