Cool Vintage AC LONG lead, mechanical Oil Temperature Gauge.

I do not know what this gauge originally came in.
It looks like AC for GMC design.  But I am also thinking marine, perhaps Chris Craft.

I am often wrong, so please verify.

Nice Cosmetic Condition.  Tested functional.
Case / Body diameter approximately 2 1/8".

I am happy to combine shipping

Thanks for looking and Good Luck, Pete