Pre-1965 12 volt gas gauges - do they exist?

[70bus]

Just curious if anyone has seen gas gauges dated before 1965 which are marked 12 volts. My 5/65 truck is a factory-12-volt model, and should have had a 12v gauge... or did VW just slap in 6v ones? A 63 parts manual does have a list of 12v parts, and the gauge is 211919033

but all the ones I have seen are 66 up.

When I got the bus it had a nonworking 67 gauge in it, and a 6v dated 63 tossed under the seat. So no help there. Asking here rather than split bus forum since likely more Beetles than buses were made 12v before 67.
_________________
Craig K
70 Neunsitzer
65 Pritschenwagen
"If Von Dutch was alive, he'd walk in there with a pistol and shoot these people."
-Robert Williams

[IN2VWS]

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[70bus]

The one marked M620 is the one I’d like to see a pic of for proof; my bus has that M code so should have 12v gauge… but I’ve never seen one. Then I need to find one in real life!
_________________
Craig K
70 Neunsitzer
65 Pritschenwagen
"If Von Dutch was alive, he'd walk in there with a pistol and shoot these people."
-Robert Williams