Let me guess your Rifle is either a model 310, 312 or 317. It was made in 1965
I'm going to try to answer your question, but first I need to clarify something:You do mean Pellet gun not Pellet gum. You did not state the manufactures name so I think you mean "Benjamin 312 Pellet rifle."Now all you need to do is verify you meant "Benjamin 312 pellet rifle" and let me know the current condition of this rifle. Also state if it still holds air and is working condition.Then I can give you and estimate of value
Model 312 Benjamin: Mfg: 1940-1969 (177 & 22 Cal) -------------------------------------------------------------------------------------------------- In perfect shape it is worth around $125
The 312 was part of a series (310 series) of rifles produced between 1940-1969. The name Benjamin Franklin was a marketing gimmick to help sell the rifle. Franklin had nothing to do with it. The series included the model 310, 312 and 317. Please state the current condition of the rifle to get an estimate of value. Is it still working? Is it in Poor, Fair, Good, Very Good or Excellent condition. Re-post you question with this information and I will try to give you an estimate of value. Make sure you put the question in the "Air gun and Air rifle" category.
I find two interesting points about this question. The Benjamin model 312 is part of the Benjamin 310 series of rifles 310, 312, 317 made between 1940 and 1969. If there is credit given why is it only on the .22 caliber version, and the second question is. Crosman didn't own Benjamin until 1992 so why would they give credit on such an old air rifle that they were not responsible for making. On Crosmans web site there is NO mention of any type of credit for this model.
The Benjamin model 312 was part of the 310 series of rifles that included 310, 312, and 317. They came in .177 and .22 caliber. Production started with the model 310 in 1940 and ended with the model 317 in 1969, the 312 fell somewhere in the middle of that time period
Depending on the condition it would be worth between $40 to $60. But that's without examining it.
Crosman still has the parts manual for all it's rifles. On the home page click on "Download a Manual." Crosman owns Benjamin. see the link below
Crosman offers a free service to locate shops that repair Crosman, Benjamin and Sheridan older air guns. Crosman owns all three air gun companies. See the link below. See the link below for all the Benjamin manuals. I don't believe the 312 manual is still available.
It was made in 1967
It was made in 1965
The Benjamin 310 series (310, 312, 317) were made between 1940-1969. In good shape it is worth between $40-$60 Cracks in the stock will diminish the value