Assistance Confirming Suspected 1905M Factory Sporter Requested

[Bluenoser]

I have rifles with both higher and lower serial numbers than his rifle.

Would I be correct in understanding you are referring to the serial number on the butt of my 1905R rather than the number on the bbl?

[Ax.303]

Yes, I was referring to the butt number 422X, but they encompass both.

Closest below is 337X. Closest above is 502X.

I also have 1905-E # 428X, (different animal but marked in the same manner) which is very close to yours.