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Anyone happen to have an Ord 9 from the 60s that shows FSN numbers for the thermostats in our trucks? Ran across a few of these dated 65/66, which I believe are M37 thermostats, but trying to confirm. My Ord 9 is 1954 so doesnt have the FSN numbers listed since they didnt exist yet .

Chrysler Thermostat FSN 6620-452-6120...

Photos:

Thermostat itself: https://imgur.com/0GwgYxk

FSN/Box Info: https://imgur.com/3QuP3L3

Any help identifying these would be awesome

looks like the one I replaced in my '52 truck. HC

Found that CC 1672621 seems to be a PN for a Thermostat for 40-56 Dodge, Plymouth, Chrysler, Desoto including trucks with cast iron thermostat housings according to a few listings on ebay. So 230ci among other engines as the number crosses to the modern replacements. Would still like to know if that is a FSN number in the top line or not though. ..

Yep, the first photo looks just like mine.
Gary

I do know a different temp t-stat (180deg) comes with the hot water personnel heater kit (fender mounted) manual part # 7531811.