Certainly not old enough to be a collectable. To determine the value, figure about half to 2/3 of the price for the cheapest new bolt action 20 gauge at Walmart.
Numrich Gun Parts Corp. http://www.gunpartscorp.com/
An Eastern Arms model 101-7 shotgun is values at $200 to $300 in fair condition. In mint condition it is values at $450. This shotgun was sold by Sears.
The value of the 410 Sears and Roebuck JC Higgins Model 101 shotgun varies greatly with its condition. In excellent condition the gun retails for about 250 dollars or so.
You can find a store brand chart at e-guparts.com that might help.
value of a jc higgins 101-40 shotgun
Stamped on the receiver and probably the barrels, too.
Numrich gun parts. Parts availability depends on if you have an old model or new model. There is a nice schematic on their website listed under Stevens 101-7
Try numrich gunparts, type numrichgp into google, usually they have a lot of parts for such guns.
I would say that with the serial number that you provided,your Winchester model 101 shotgun was produced in the year 1972.
It is a Savage/Stevens Model 94, and the barrel has been cut off. Value is minimal.