Anyone know what model Look cleats these are? I would say they date back to the early 90s.

Are new fangled (to me at least) Look Keo cleat compatible hole-wise with these?

... and the reason why I'm asking. Thought I get some road miles in, checked the bike and noticed the RH pedal was a bit floppy, further investigation shows why.

Look Delta

Deltas not compatible with keos. Only old look and knockoff look pedals.

IIRS, those were fairly low level pedals in the Look lineup and it looks as though you, or someone else, have had the best out of them. Id say it's time for new pedals. If you fix that one, the Delta cleats are readily available around here and in the UK through RIbble et. al. if there's none at your LBS.

The 3 hole pattern for the screws-to-shoe should be compatable. I don't believe Look changed that over time.

delta / arc cleats with no float, i think exustar still make new pedals which use these style of cleats.

http://www.exustar.com/2011/pr70p.html

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No, I am not trying to sell you something.

Yep, still using my Sidi Genius 2 shoes from the mid-90s' with my Keo cleats.