That's a postwar 99R, they come up more often but still bring a premium. Things like recoil pads help bring the price back down tho.
A prewar 99R's forearm is different from the postwar's by not being any wider than the receiver, but it still has a rounded end rather than a schnabel end, plus the prewar has 2 lines around the end and the forearm checkering goes all the way under. Really, the prewar 99R looks a lot like the 1950's 99F except for not having a pencil thin barrel and hollowed out buttstock.
Here's my prewar 250: