It looks to be a 1st series to me from the mag holder at the bottom instead of the side of the frame. Also by the grips used. It looks to have been nickel plated, but was it a factory job or aftermarket job....who knows except Colt. What's really got me are the stamps or proof marks on the slide, frame and barrel. I've seen pics of German proofs on Woodsmans, but this isn't like them. I would definitely shell out the money for an authentication letter from Colt on this one, but that's just me Absolutely beautiful piece! I would definitely like to hear what preWoodsman and/or Bob Rayburn has to say on this one. According to proofhouse.com, the serial # falls in the 1934 range. '34 starts at 88000 & '35 starts at 93000...so possibly a late '34 1st series?
I grabbed this off of colt22.com just for comparison: