Benjamin made this model from 1946 to 1985, but did not start serializing them until 1957. I also have a Benjamin Franklin that has no serial number. Before 1957 it is not possible to set an exact date. Just know it's OLD.
The 137 is a .177 caliber pellet pistol the 132 is a .22 caliber pistol and the 130 is a BB pistol.
It was made in 1960
It was made in 1980
If the number is T131774 then it was made in 1972.
serial number T170160 would have been made in 1973.
It was made in 1961
Yes
It was made in 1961
If you are looking for the serial number and can't find one, then there most likely is not one. For a time Benjamin did not put serial numbers on their pistols. I also own a Benjamin that has no serial number and had to do some research to find this fact out. Reference: "Blue book of airguns"
Yes. Crosman owns Benjamin. see the link below.
T427432 was made in 1982.
If it's T123136 it was made in 1972
You have given most of the information to answer this question, but I need to know the condition of the pistol. The current condition determines it's value. I also need to know if it still holds C02 and works.