This looks like a solid M-38. It still runs 24 volt.

“I am selling my 1951 military willys jeep. The tub is all original as is the motor and it has O rust. The floors are as solid as when they came off the production line. It is set up with the 24 volt system and has 2 new batteries. The tires and tubes are in brand new condition and i do have a spare tire and rim. It comes with a as i was told old new stock canvas top. The bows on the jeep are new and yet need to be painted. The wiring in the jeep does need to be redone as it is the original wiring. the wiring is good for starting and stopping the engine. The engine is solid and starts and runs beautifully. The high and low 4 wheel drive work great as does the 2 wheel drive. The jeep has a couple spots that for some odd reason were spray painted black but that is a easy fix with a can on military match spray paint. I am a ww2 reenactor and i was going to use this jeep but i decided to go with a motorcycle instead. If you have any questions please feel free to call me at 616-450-2194 ask for Tim. If you are a craigs list scam artist dont waste my time with your ass wipe offers. thanks for looking”

http://grandrapids.craigslist.org/cto/3163467165.html