70 $
its worth about $70 depending on how beat up it is.
Winchester did, it's a clone of the Winchester 121
The Sears Model 1 22 caliber rifle was a single-shot made by Winchester. Winchester also made the gun as their model 121. I have a "junior" model of the Sears Model 1 that I received from my father in 1967. The junior model is a smaller version of the gun for the beginner shooter. I have seen a Winchester 121, and it is not only longer than the Model 1, but the gun stock is also slightly different. The model 121 had sling swivels and my Model 1 does not.
About $100-150 given condition.
100
The Winchester model 121,121Y were made by Winchester in the years 1967-1973.
The value of a Winchester 121 22 single shotgun depends on its condition. As of 2014 these sell at auction for around 160.00 in excellent condition.
Winchester didn't make it, Remington did. Worth 222-350 depending on condition and lust level of buyer
According to the store brand cross reference in Numrich gun parts corporation's catalog, Sears model 2t was made by Winchester. I believe it is a Winchester model 141 because the model 131 is magazine fed and the model 121 is a single shot.
$80-$150 in great condition
Your rifle was manufactured by Winchester as their model 121. The spent shell is removed from the chamber by action of the right and left extractors and is then bounced out by bumping agains the ejector. Look for problems there. Parts are available from gunpartscorp.com.