A 20 guage WInchester 37A youth model will go for between $100-150 USD depending on condition.
$200 in very good condition
$125-$200 depending on condition. sales@countrygunsmith.net
The price range on this model of Winchester shotgun is between 125-175 dollars,depending on overall condition and a good bore.
I have one that was purchased new for me in about 1971/72.The Winchester model 370 Youth shotgun was produced from 1968-1973.
Model 37A Single Barrel Low $55.00 High $140.00 Model 37 Youth Low $40.00 High $175.00
between $80-$120 depending on condition and buyers desire. Possibly more as winchesters are becoming collectable.
The Winchester model 20 was a youth .410 single shot gun manufactured between 1918-1924. Only about 24,000 were built. Your serial number is not from a Winchester model 20.
This Winchester shotgun is valued between 90-150 dollars,depending on overall condition and a good bore.
I see these selling at www.gunbroker.com for around $150 if it is in good condition.
Between 170-200 dollars in the description that you have provided,including the original box and choke tube wrench.
I have had several of the 410 37a youth and full value is 125 to 200 depending on condition