It may not have one. Serial numbers were not required by law on rifles and shotguns until 1968.
This question cannot be answered without you providing the serial number to you Glenfield model 60 .22cal semi-auto rifle.
The serial number is on the left side close to breachthe first two number on most mod 20 is the year of manufacture.
your serial number indicates that your Glenfield rifle was made in the year 1977.
With no serial number provided,I cannot determine the age of your Glenfield model 60 semi-auto .22cal rifle.The value of these rimfire rifles is between 60-110 dollars.
With the serial number that you have supplied,your Glenfield rifle was made in the year 1973.
With the serial number that you supplied,your Glenfield model 60 rifle was made in the year 1978.
With the serial number that you have provided,your Glenfield model 60 rifle was made in the year 1976.
With the serial number provided,your Marlin .22cal rifle was made by Marlin in the year 1985.
manufactured 1970
By the first two digits of the serial number. AB
No way of knowing without a serial number and model number to put to your .22cal rifle.
Your winchester model 1890 .22cal rifle was made in 1904,with the serial number that you provided.