I dint think its either Schneider or SK Grimes, the logo doesnt match, it doesnt fit anything I have or am likley to buy so I am going to sling it on eBay for a tenner and see if it sells. It might be just what someone is looking for ...price ? I would happily pay a tenner to find a Tamron Adaptall lens cap for an Adaptall 1, old Tamron logo, in 67mm snap on cos I have OCD and need it for an old Tammy lens I have.
Not so long ago I forked out the same for a genuine Nikkor lens cap, pre Nikon, and promptly lost it. Some chancer on ebay is asking about £50 now for the same item