The M/N was made in caliber 7.62x54R. However, many were modified. Have a gunsmith examine it, and if necessary take a chamber casting. Measurement of the casting can tell the smith the exact chambering.
Depending on the condition and original parts a top figure around $400.00 could be expected and a low around $150.00.
I beleave it's worth around the same as mine. Igave 95 dollars for mine and it does have proof barrel marks. also it has onesided T and a quarter drop down,after the 1915,
Directly from Westinghouse would your best first bet...
He lives in New York.
There's a few different variations on the markings, but they all say "New England WESTINGHOUSE" and they're all marked 1915 (even though production ran from 1915 - 1918). Above this, there should be the Imperial Russian stamp, although some rifles have this scrubbed. The most rare of these are the ones used by the US in their expedition to Siberia. These will be marked with a flaming cannon ball on the bottom of the stock fore end. Any additional markings you will find probably won't be from the manufacturer. If you can send an email with photos or descriptions of the markings, I could probably identify them for you (my email address is listed in my bio page).
There's a few different variations on the markings, but they all say "NEW ENGLAND WESTINGHOUSE" and they're all marked 1915 (even though production ran from 1915 - 1918). Above this, there should be the Imperial Russian stamp, although some rifles have this scrubbed. The most rare of these are the ones used by the US in their expedition to Siberia. These will be marked with a flaming cannon ball on the bottom of the stock fore end. Any additional markings you will find probably won't be from the manufacturer. If you can send an email with photos or descriptions of the markings, I could probably identify them for you (my email address is listed in my bio page).
Ebay
George Westinghouse was born on October 6, 1846 in New York. He died on March 12, 1914 at the age of 67
The New Butler - 1915 was released on: USA: 5 June 1915
Her New Yob - 1915 was released on: USA: 22 April 1915
The New Valet - 1915 was released on: USA: 10 July 1915
The New Sheriff - 1915 was released on: USA: 28 January 1915