It is a late Model 94 standard sporting rifle. The good is that it appears to have a buttstock with trapdoor. The trapdoor was available as a special order option for the 94, but is rarely seen. While too late to letter, it could be determined original or not by a good hands on by the right person. However, the bad. As alluded to above, the receiver has been drilled for a receiver sight. Winchester did not start drilling and tapping later 94 carbines until circa 1951...ish. Drilling and tapping was available on special order from the early 30s on some models, if requested by the customer. Those two extra holes are indeed detrimental to collector value, but still a good looking rifle. While scope and receiver sights were golden to those old timers at the time in increasing the range, etc, of those old guns, it hurt the "value" (and I use quotes) of many fine old guns.
Matt