A 20 guage WInchester 37A youth model will go for between $100-150 USD depending on condition.
Your Winchester model 37a was a reintroduction of the model 37 which occured between 1973-1981.That is when your model 37a was made.
I have had several of the 410 37a youth and full value is 125 to 200 depending on condition
50-300 USD depending on specifics
$125.00 to $200.00 in good working condition.
120
Serial # C861323
there are several listed at gunbroker.com
your winchester model 37 value is currently between 150-375 dollars depending on the overall condition and having between 60%-90% original finish and a good bore.
The 37A was manufactured from the mid 1960's to the late 1970's.
can you tell the age of a model 37a 20 gage Winchester by looking at the serial number
Model 37A Single Barrel Low $55.00 High $140.00 Model 37 Youth Low $40.00 High $175.00