No
It was made in 1978. Today Crosman owns the Benjamin line of air guns.
Most likely around late 1956 according to Crosman who owns Benjamin.
It was made between 1968 to 1986. It is a .22 caliber rifle. If you want the owners manual for this rifle see the link below. Crosman owns and makes Benjamin and Sheridan rifles.
Impossible to answer. Serial numbers are not unique to only 1 item in the world.
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
Your best answer should come from the manufacturer's customer service. Today Crosman Corp owns both the Sheridan and Benjamin line of air rifles. See the link below
The Blue Streak has been in production from 1995 to present. If you want more Information I suggest you contact Crosman who owns both Benjamin and Sheridan. See the link below.
No
Your chances of finding out are less than winning the world's biggest lottery.
Unless the owner sees your question, you will likely never find out.
There are 4 versions of the Blue Streak CB9 BLUE STREAK 1995 (SOLDERED VALVE) CB9 1995-1997 PHASE 1 CB9 1997-2003 PHASE 2 CB9 2003 - PRESENT BLUED BARREL CHECK YOUR SERIAL NUMBER AND SEE THE LINK BELOW Today Crosman owns both Sheridan and Benjamin air guns / rifles
Yes. Crosman owns Benjamin. see the link below.