Since you haven't gotten an answer I'll try. It is a post WW2 rifle made by Savage Stevens in Westfield MA for Western Auto Stores (Revelation). Is there a Serial Number? If not it has to be pre 1968. I do not know how to find the date but by the 1970s the Western Auto Stores around here were gone. I would guess the 1950's Maybe others can add something.
As I recall that design of .22 were quite good if kept clean. We sold a number of them used and I do not recall any complaints. We did not have any quams about buying or selling them (1980-2005)
I saw that onnenut. When I treied to call that number several days ago, it's a fax #. They've been Re-aquired now. There out of their offices til July 13th. I have a current # for them. Maybe they can tell me about the serial. , it's a fax
I was bored did some surfing and didnt find much. I found a site that cross references most guns made by savage stevens and mossburg and high standard that were sold by various companies with tons of cross references but they only list the revaltion 160 with out the A on it. One was made by mosseburg the other savage. I looked at the savage and it said it was a model 80. I tried finding a model 80 couldnt. But seen a querie where it made mention it was a pump so that was a dead end.
Maybe they can tell you when you call or you could go into a savege stevens forum where the collectors could give you some imformation.I even went to numericks where you can look at schematics for parts and had no luck except to find they have a barrel for it for sale.