I think they're mostly 914 fronts?
The silver ones are the sought after 911S calipers (at least I think).
I'm trying to identify from a large horde of parts I found.
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...and these
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Silver ones are 911S. In the 3rd picture the ones with the WIDE springs are 911. Ones with 2 bleeders are 914 and 411/412 VW.

Thanks for that friend.
Reckon I should swoop down on um?
Specially the 911S Alum's.
Do I recall a thread about that modification?

S calipers have 3.5 inch bolt spacing and require struts with the same. They are prone to corroded pistons and pricey to rebuild. It the price is right go for it. I sold a good used set for $500 which is on the high end. The other 911 calipers look like M calipers with 3" spacing. If they are cheap I would get them. Hopefully the pistons are not seized.

I was thinking of getting them for my 911 five lug converted, Sheridan bodied, V-8 converted 1973. But the rear is stock 914 (five lug converted), so I reckon the brake bias would be waaaay off. The price is KILLER good :-)
The 911 ones are 125 a set and I won't mention what the 911S Alum are cause ya'll would soil yerselves. Suffice to say the price is to good to pass up.