Need to know the age and value of a rifle

I have a sears roebuck ranger 22 rifle model #102-25 serial# 33077k. It is a pump rifle...I need to know the age and approx value of this great shooting rifle.
My grandson will be tickeled when he is old enough to receive it...
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This is actually a Savage, they put a K suffix on there guns made for "store" brands. ( I actually thought the 102-25 was a shotgun but apparently not)

It's either a model 25, 29, or 29A.
If the slide release is on the right side of the frame it's either a 29 or 29a. The 25 is at the front of the receiver.

I'm not sure what all the differences are between them other then the 29 I've seen have a beehive style pump and the 29-A was solid with checkering.

25 - 1925-1929
29 - 1929-1932
29-A 1932-1960

Now is Sears sold them all those years???