Albinar's preset telephoto — the 200mm f/3.5 Special with manual stop-down.
The Albinar 200mm f/3.5 Special Telephoto Preset is a budget telephoto prime with preset aperture operation, likely in a generic screw mount. This appears to be a preset-aperture variant of the Albinar 200mm f/3.5 Auto, designed for use with camera systems requiring a preset aperture mechanism.
The lens delivers 200mm at f/3.5 maximum aperture with preset aperture mechanism (pre-set ring plus manual stop-down ring), a generic or M42 screw mount, and full-frame 35mm coverage.
The preset variant of the Albinar 200mm f/3.5 provides the same focal length and aperture as the Auto version but with older manual aperture operation. The null mount suggests the specific thread size is unconfirmed.
Identify the mount thread from physical inspection. Test preset aperture ring operation. Inspect elements. Compare against the Auto version (id=4485) to confirm whether this is a distinct variant.