How old is my Winchester Model 37?

The Winchester Model 370 (M37) Single Shot Shotgun is an American firearm. It was in production from 1936 to 1963, with 1,015,554 units made.
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Winchester Model 37.
Winchester Model 370
Produced 1936–1963
No. built 1,015,554
Variants Model 37, Model 37A
Specifications

Does Winchester make shotguns?

Winchester Firearms will continue to sell and grow its current line of Select Over & Under shotguns, the new Super X3 autoloading shotgun, the new Super X autoloading rifle and Limited Edition rifles. The company also plans to introduce new models in the future.

What is a Winchester Model 12 gauge?

The Winchester Model 1912 (also commonly known as the Model 12, or M12) is an internal-hammer pump-action shotgun with an external tube magazine. Popularly named the Perfect Repeater at its introduction, it largely set the standard for pump-action shotguns over its 51-year high-rate production life.