Advice Wanted What Lens Mounts Are These?

agentlossing

Hall of Famer
Location
S. Oregon Coast
Name
Andrew L
I've been trying to clear out some of my accumulated junk/gear. I have a couple of lenses which I can't remember the origin of, and don't recognize the mounts. My common past SLR mounts were Konica AR, OM, Pentax K and M42. I doubt I ever had a camera, working or not, to go with these. Any ideas?

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agentlossing

Hall of Famer
Location
S. Oregon Coast
Name
Andrew L
That would make sense if the first one is a Canon FD, it looked vaguely like one to me. However the second is no Pentax mount. It's a Vivitar 28/2.8 MC lens, most of the examples I pulled up were Minolta mount and that ain't it. I'm puzzled.
 
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