Your Winchester model 37a was a reintroduction of the model 37 which occured between 1973-1981.That is when your model 37a was made.
A 20 guage WInchester 37A youth model will go for between $100-150 USD depending on condition.
These inexpensive Winchester shotguns are selling for between 55-140 dollars.
Serial # C861323
there are several listed at gunbroker.com
The winchester model 37-A was a reintroduction of the model 37 shotgun.these were made between the years 1973-1981.Winchester did not keep serial number records of the model 37-A. I am sorry but that is the best that I can do.
The 37A was manufactured from the mid 1960's to the late 1970's.
I have had several of the 410 37a youth and full value is 125 to 200 depending on condition
can you tell the age of a model 37a 20 gage Winchester by looking at the serial number
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.
Between 90-200 dollars,depending on the overall condition of your shotgun and a good bore.
You will have to check the auction sites to see what they are currently bringing.