Mac / Dick / Richard,
Thanks for your responses. I bought this on ebay and it hasn't arrived yet. When it does, I'll be sure to report any numbers I find (although it sounds like you guys have nailed it). I guess the photo is deceiving, as this did not appear (to me) to have the slope back tower. I thought it looked like 36-38, but I guess the photo was taken from a bad angle. Live and learn. Thanks again.