I'm a tour guide at Scotty's Castle in Death Valley National Park. I'm trying to do some research on a Caterpillar / General Electric 15KW DC generator set that was "new" to the Castle in the fall of 1954. I cannot find a nameplate on the engine but the generator was mfg. in 1942. The generator is rated at 15KW, 110Volts at 1200RPM. We're assuming that the organization that owned the Castle in the 1950's bought (or had donated) this unit as WWII surplus as we don't think that the original owner would have bought, or tried to buy, something like this during the war just to put out here in the Valley as a standby power unit for the Castle. Is there a serial number cast on the engine somewhere that could be referenced in lieu of a nameplate? I've attached some pictures and any help or pointers in the right direction would be appreciated.