Jon
The 30A circuit breaker on the switch I took off the truck was a Made in USA Litelfuse. The switch body had Made in USA stamped in two places, bottom under where the pot mounts and on the front (normally covered by the circuit breaker.)
The 12V switch has no markings on it except for 20A on the circuit breaker and 12V stamped on the bottom of the switch body.
Maybe I should have swapped out the switch body as well, to keep the Made in USA markings.

Both look just like Jim Carter's 1936 -1955 Headlight Switch 6 Volt Close to Original Chevrolet and GMC Pickup Truck Item # EL149