Today Crosman owns Benjamin. see the link below for the dates of manufacture.
It was made from 1946 to 1985.
It was made in 1980
The model 100 was made between 1935-1941.
I don't believe Benjamin ever made a model 170, but they did make a model 177. Is this the BB gun you are asking about?
Benjamin made several 22 cal models. Which model are you asking about.
The model 132 was made from 1942 to 1986.
It was made in 1961
If you are asking about the Benjamin Air gun model 342? It was made between 1969-1992
Benjamin Franklin BB rifles were made by Benjamin air rifle. The name Franklin was added as a marketing ploy. Walter Benjamin founded the company in 1899. Today Benjamin is owned by Crosman Airgun Corp. If you have any other questions then you need to state the model and condition of the rifle.
It was made in 1969.
It was made sometime between 1969-92.
If the number is T131774 then it was made in 1972.