1946 is significant because of the change over from type I to type II receivers began in 46. Some guns had the doll's head tang and pre-war safety without being tapped and others had the newer type safety and no doll's head and were tapped for scope mounts. Some had a features from the pre-war and post war combined.
Since yours has a side mount it probably is a pre-war model below 61,000 serial number.
What features does it have?
