Yup, that looks just like mine, except mine's full of grease and one of my coils appears burned. I'm thinking the combined DC and AC windings might throw a rewind shop for a loop, I'm going to do some calling tomorrow.
BTW, I have 3 pairs of brushes on the commutator, I'm guessing one set for excitation, one for generating and one for starting (motoring), is that right?
Also, looking at the unit from the slip ring end on the right side, there's a 1" diameter aluminum cylinder which has a post going through the comm brush holder assembly with a wire attached to each end of the cylinder, any idea what it is?