Found it. “Anitque Auto Batteries” under accessories. It is indeed a 12 volt battery with a 6 volt tap. Requires a 12 volt charging system. Used to run a 12 volt system with 6 volt accessories. Sound familiar to you guys needing to run 6 volt heater fans, gas gauges, etc.
As stated before, this battery is dry so no voltage readings could be taken. Thanks for the help.
