You can find info on most of the Bolens walk-behinds (late 1940's-1950's) here:
You can find manuals for several models of the Bolens VersaMatics here:
You can compare the pics in the manuals to what you have.
However, if you clean off the flat part of the chassis behind the engine, you may find a Bolens tag giving the tractor model number.
The numbers you posted above for the B&S engine are not complete. ....There should be a model number to the left of those numbers on the same plate.
If you have the original B&S engine and if you have a VersaMatic, it is probably a model 15FB or 15FC tractor.
Edit: I just saw that you posted a pic in another thread. ...Yes, it is a VersaMatic, as Brian said.
Is the B&S engine cast-iron or aluminum? ....If it is cast-iron, it is probably a Model 8 manufactured in August 1953.
Bolens manual for the 15FC-01,02 says B&S Model 8. ....8 is a cast-iron engine.
Bolens manual for the 15FC-03 says B&S Model 8B. ....8B is an aluminum engine.
Edited by Bruce Dorsi, April 10, 2017 - 05:42 PM.