I was recently given an "H" Farmall by my best friend from out in Oklahoma. The serial number is FBH 284564 X1. This tractor had narrow dual tires mounted on each rear rim. The rim is one piece, but has to 7-40 tires mounted on it. ALSO a guy I talked to said the "X1" in the serial number indicated it was experimental. The original paint appears to be white. It has been painted over red, but the white paint still shows through on the engine, rear axle and front section. Can anyone tell me how I can find out if this is an experimental tractor? Was it supposed to be white instead of red? Thanks, Dan.