Which '03 am I looking for? (Navy use)

[Cosine26]

The normal safety is to the left for fire and right for safe. In 1928 the safety was reversed on NM rifles. With the "S" stock, if one "crawled" the stock in prone slow fire, he would probably get hit in the nose by the standard safety. ERGO - the reversed safety which put the safety to the right when in the FIRE position.This safety was available up through about 1931 when the supply was exausted.I believe that the idea came from K.K.V Casey, an early shooter.
If your "C" stock has an "S" in the cutoff recess it may well be a pre war Springfield stock. This is a valuable stock.
It looks as if your bolt is a DHT. Quite a comon cbange by shooters since the NS bolts were "sticky",Or it may just have been installed during overhaul. See Vi's bolt chart.