Benjamin Air Guns and Sheridan Air gun are both owned by Crosman air gun company. Most Benjamin's are made here in the United States, but a few models like the Benjamin Super Streak are made in China. Daisy also has some models made in China like the new re-released model 25 it is also made in China. All you have to do is look at the box and it has to say "Made in China" if it was made there.
It was made in 1978. Today Crosman owns the Benjamin line of air guns.
Benjamin Air guns made several models during the 1960's please state your model so this question can be answered.
Contact Crosman: www.Crosman.com they have a service on their web page that directs you to people who repair old Benjamin rifles. Crosman Owns and makes Banjamin rifles. The name Benjamin Franklin was a marketing stunt to sell rifles back in the 60's & 70's. It was made between 1969 to 1992
Go out and locate a book called "Bluebook of Airguns" it list all air guns made. Or go to the Crosman web page http://www.crosman.com/airguns/service/manuals/benjamin-and-sheridan you will find all the air guns listed there.
Today Crosman air gun company owns the Benjamin line of air guns. Crosman offers a free service to locate independent repair shops that work on Benjamin air guns. See the link below.
Crosman is the current Owner of Benjamin. You can find out some information on www.Crosman.com under customer service. However I suggest that you get the book "Bluebook of Air Guns 7th edition" and in the Crosman section & Benjamin section you will find your answer.
Check the Benjamin line of air guns at www.crosman.com. Benjamin make metal air guns. Also there is no such thing as BB bullets. BB's and pellets are fired from Air guns.
The model 340 was made between 1969-1986. I believe you have the first number wrong. I think the Serial number is T280984. If so it was made in 1977. See the link below for Benjamin dates. Crosman owns Benjamin and Sheridan air guns
There were several variations of the Benjamin model 397. Crosman Corp owns the Benjamin line of air guns I suggest you see the following web page to get your answer. https://support.crosman.com/hc/en-us
Benjamin Sheridan makes both .22 and .25 caliber pellet guns. ----------------------Corrected answer---------------------------------- Crosman air gun company owns both the Benjamin and Sheridan line of air guns and rifles. The Benjamin rifles models are made in .177, .22 and .25 caliber. The Sheridan line is only made in .20 caliber. The name "Benjamin Sheridan" is no longer placed on any one model. In the past Benjamin did make a 20 .cal pellet gun Benjamin also makes a .357 caliber model named the Rogue.
Crosman air gun company owns Benjamin air guns. The offer a service to locate a repair center that restores or repairs older air guns no longer being made by Crosman or Benjamin. "Click on the link below" When the Crosman home page opens scroll down and click on "Find a service center" It will assist you in locating someone to repair your Benjamin air rifle.
It was made between 1938 and 1942. Today Crosman owns Both Benjamin and Sheridan air guns and rifles. For the Owners Manual see the link below.