[SEL] Fuller & Johnson help needed

[cgandree at mchsi.com]

I have finally brought out one of my back burner restoration projects a little Fuller & Johnson engine that I bought at an estate sale some 15yrs ago. Believe it to be a model N, 1 1/2hp. This previous owner had completely torn down the engine and was planning to restore and get running so
all the parts were still there.  It also has both the ignitor asy as well as the spark plug asy so
its possible to run it either way.  I am chosing the ignitor method.  When sorting through all the parts yesterday discovered that the ID serial plate was missing off the hopper, just the two brass screws were there. I can't remember if I bought it that way or have missplaced the tag. My help question is does anyone know where the serial number might be stamped if at all?  I have pretty much wire wheeled all the of the engine and checked the most likely places like water hopper, flywheels, end of the crank shafts and flat areas just forward the crank shaft.  Also who might have repro tags?
thank you in advance,
Curt Andree