Yes, in so far as all numbers are squares (of some number). But it is not a perfect square.
Prime.
can you tell the age of a model 37a 20 gage Winchester by looking at the serial number
4y2+37a-15=0
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
The 37A was manufactured from the mid 1960's to the late 1970's.
The main difference is that the hammer and the thumb lever to break it open are reversed. On the 37, the hammer was rear and the thumb lever was farther forward. the 37a is reversed. the 37a also had a gold colored trigger.
120
The Electric Company - 1971 37A 5-37 was released on: USA: 9 December 1975
A 20 guage WInchester 37A youth model will go for between $100-150 USD depending on condition.
I believe that your Sears shotgun is a Winchester model 37A shotgun that was made for Sears Roebuck And Co,.
Serial # C861323