What mount is this film era lens?

From memory it looks like my old Olympus OM1n, I could be wrong though. Is it a Zuiko lens
It looks smaller than the OM and the olympus didn't have that square notch.
And didn't the OM have a button to release the lock pin, or maybe I've got it all wrong :)
 
Have you tried this...

 
Have you tried this...

I did look there and couldn't see it. The lens is a third party one, weighty and solid. I wanted to try it out on my Olympus digital but for the life of me cannot identify what adapter I need.

20240302_100227.jpg
 
I would have guessed Konica, centred notch on the wider of the three bayonet tabs. On Minolta the notch is more toward the edge of a bayonet tab and it's slightly shorter than the other two.
 
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I should have put up a poll :D

Definitely looking like Konica is the most favoured and I don't have a Konica to M4/3 adapter. I'll keep it for now and see if I come across any decent Konica mount glass in my auctioneering and make getting an adapter worthwhile.

Thanks everyone.
 
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