I think mine is from the 50s. They were made in Burbank California by an aerospace firm trying to keep their workers after WW2 wound down. The early ones were late 40s vintage and the company moved to North Carolina and built them into the 50s. I think Sears sold them for a while, maybe it was Monkey Wards. The web site earthmastertractor.com has lots of details. Mine is loaded with all the option, I found it on CraigsList. the N62 engine had the valves welded to the valve guides due to water being allowed down the exhaust so I got it for 650 dollars. I repaired the valve train and it runs great. So I’m happy to have a neat little tractor that’s usable for the price of a used riding lawnmower. No parts are missing, it even came with a mold board plow that weighs 500 pounds, that’s laying in my yard. it also has a hydraulic pump that operates the lift cylinder on the rear. I exercise it in the summer and keep ethanol free gas in it. They’re kind of cool I think, it only goes 8 mph due to the governor on the engine. You don’t have to split this tractor to put a clutch in, that’s helpful. 6 volt of course, but like most people I run an 8 volt battery. I’m going to put a 6 volt electric fuel pump on it this summer and ditch the ancient mechanical unit. It has a PTO and the big drum thing that drives a belt.