The CIMKO Zoom Lens 28mm to 80mm f/3.5-4.5
This lens uses an Olympus OM type of mount.
Possibly a rare lens which can be used on newer generation SLRs by using an appropriate OM Lens Adapter. This would be a considerable supplementary item for a Film SLR collection.
Did you know that Olympus OM mounts are the most stable of any Manual Focus lens mounts?