Also, although the data I provided is as accurate as I could gleam from different reference guides. There are all kinds of differing variations out there. I have 2 10-11's, they should be thin barreled variants, but one is a thin barrel while the other is a heavy barrel. The heavy barreled one was a police trade-in so it may have been a special order. That's part of the fun of collecting model 10's, it's a never ending quest to find all the different possible combinations and deviations from the norm.

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Cheers....Obi-GUN