1953, this later version of the submini model IIIa was produced for export to the USA and Germany. It takes 17.7mm unperforated film, achieved by cutting 35mm film in half. Dust inside lenses, even new ones, won’t affect images.
Dust inside lenses, even new ones, won’t affect images. If you plan to use them professionally, service or cleaning is advised. Expect reasonable functionality and optics without noticeable issues, unless specified.