Bolens 1000 (Brian) is correct (as usual) !!
The tractor was originally equipped with a 6 horsepower Briggs & Stratton engine having a Model # 142302 and Type # 0198-01.
The B&S engine numbers should be found stamped into a square plate attached to the rear of the engine's cooling fins, if that is the original engine. ....Later B&S engines had the numbers stamped into the sheet-metal housing near the carburetor mounting.
As shown in the picture Brian posted, your Bolens was originally painted gold in color.
For a 52 year old tractor, it looks like it is still in good condition!