The first gun with a rifled barrel (a rifle is any gun with grooves cut into the barrel to give the projectile spin) used by American forces was the Kentucky rifle, used in the revolutionary war.
Contact TASCO for a manual
The Value is set by the current condition of the rifle. You need to give more information if you want an answer. Give it some sort of rating. Tell me more. Then I might be able to answer you. Who made the rifle?
Rifle made in Europe. That is a proof mark showing it was test fired in a government proof house. We need a lot more information to give you information.
Without additional information, it would be impossible to give you much information. That appears to be a serial number, which would indicate a modern reproduction of a Hawken rifle.
Try the Blue Book of Gun Values
Get a lawyer for the correct answer. You do not give enough information.
Sold by Speigel Catalog
In order to give you an estimate you will need to give more information about the air rifle. Like, is it still working and what condition is it in? You will have to estimate the condition, Is it in Poor, Fair, Good, Very Good or Excellent condition. Without more information it is not possible to give you an estimate of value.
What condition is it in? You need to give more information about the rifle. It was made between 1975-1982. Without more information it is not possible to give you an estimate of value.
How old is it? Who Made it? What shape is it in? you need to give more information to find out the value.
3 to 9 magnification with a 50mm objective lens