Yeah, I think 41 would be a motor/generator arrangement (no tubes, I think they used a rheostat to control the field strength on the generator). Looks like you got a taper attachment (or at least part of one) which is a nice feature. Other than some gunk, and a little surface rust, it seems in good shape. You might make out ok on this one
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One thing I forgot to mention is that, while it takes standard chucks (D1-3 IIRC), the spindle taper is wierd (Jarno, can't recall what size). They shipped with a Jarno to MT2 adapter. You might casually ask if he has it lying around. That is if you ever intend to use a center in the headstock. Tailstock should be a standard MT2.