That lens assembly, ¡°Oscillo-Raptar¡± 88mm, 1:1, is one of several interchangeable lenses that fit C-12, C-13, C-19 and C-27 camera bodies. The part number was initially 122-608 and hen updated to 122-0608-00. In later catalogs, it is listed as Option 3 number for C-12 and C-27 cameras?
