Yes, lots of good info in there on the history. Looks like my stock was originally a long rifle and cut down as you said then installed on a carbine. The swivels are not on the side as the carbine's picture shows. Although that may have been one of the modifications implemented in the 1914 version so it may be the original stock cut down. Also the bolt handle on mine is the "butterknife" style.
I cleaned it up and the bolt operates silky smooth.
Any guess to its value? I'm going to sell it and wondering if anyone has an idea.