Commerical No.1 Mk.III date?

Hello all! I have recently acquired a very nice BSA commercial No.1 Mk.III in a trade. The gentleman I received it from suggested it was made in the 1914-1916 time-frame, but I have been searching all over the web to find out how I can determine the date but haven't had any luck. Here are some facts:

- Top of receiver and side of barrel have South African "U" with arrow
- Bottom of barrel has multiple marks, including a "W", a "T", and the number 3 inside of a star, and a "/10" to the bottom right of the star.
- All numbers match (except barrel which isn't numbered)
- There is a "V" and a "T" stamped under the buttstock
- Serial number is 13192
- Receiver and barrel have the BM inspector marks

Any help would be MUCH appreciated! I can take pics of whatever you guys need

https://www.milsurps.com/images/impo...a4780b30-1.jpg

https://www.milsurps.com/images/impo...950f88d0-1.jpg

https://www.milsurps.com/images/impo...26fef20f-1.jpg

Quote:

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Originally Posted by ironcross44

Receiver and barrel have the BM inspector marks

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They are not inspectors marks but Birmingham Proof marks (Birmingham Military). In addition to the BM marks, you will find a pair of crossed sceptres with the date of Proof code. You can find out how to interpret the codes here: http://www.rifleman.org.uk/Dating%20your%20rifle.htm

Thanks! I did find the code on the barrel (scepters with an "O" for 1935/36). Is there only supposed to be one on the barrel? That's the only one I can find.

Quote:

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Originally Posted by ironcross44

Thanks! I did find the code on the barrel (scepters with an "O" for 1935/36). Is there only supposed to be one on the barrel?

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Yes. That is correct.