I'm resurrecting this thread because I just received today a bit earlier example of one of these. Mine has what appears to be a factory lanyard ring was well, as the serial number is offset to one side to accommodate it.

On the top of the backstrap, it is stamped "No 19" and down the backstrap is stamped "Conservation Commission - State of New York"

It is serial number 251498 - which I think places it about 1915. It was sold in an on-line auction as being in "poor condition", but it is far from poor. It has some finish issues, but the action is tight and the stocks are really nice. I got it for about $200 after commissions.