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Discussion Starter · #1 ·
I have 2 TM1's. One is an Ithaca import and is marked as follows.

18.5 gr and 450

I also have a TM1special that is marked

18.4 gr and 440

What does these number mean? Any input is greatly appreciated. Thanks.

Jerry Nickell
 

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18.4 & 18.5 are bore diameters in mm. 440 & 450 are probably 1.440kg and 1.450kg indicating barrel weight in grams
 

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Jerry

You need to post pictures of that engraved TM1 special. It is super nice. I am glad you bought. Nicest one I have seen.

Joey
 
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