Advice Wanted What Lens Mounts Are These?

[agentlossing]

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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[Knikki]

At a guess I would say the top one looks like a Canon FD mount
The bottom one maybe a Pentax PK-A mount? but not sure.

 

[Andrewmap]

I think the top image might be Canon FD mount, not a clue about the second lens.

 

[agentlossing]

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.

 

[Walter Palmer]

That second one has the "pin grabber" that I remember from Nikkor days.

 

[Brian]

The second is Nikon F-Mount, AI auto-indexing version.