Kuduae,

Thanks for the information. I've come across threads on this before, but you've done the best job describing the differences.

As an aside, anyone know if each model carries its own serial number range? I would presume this to be the case given my 1910 is SN 6296 (1920 proof) and there were pics posted recently of a 1903 bearing a SN in the 13K range, also with 1920 proof. I understand too that total production estimates for the pre-war rifles are unavailable? Any best guesses?