John, Just wanted to say thanks for taking the time to try and figure this out. This is sort of a mystery to me. I will be looking forward to that page in the mail. Hopefully we can figure this out. Also I see that Frank Dodson said that his 1946 ad showed model 38 drill. His 49-50 ad does not show the model 38. The water is about is dirty as mud now! Your serial # list is not jiving w/ his ads so this could be very interesting.(grin) Oh well, like you said, its good entertainment.