With the serial number that you have supplied,your Winchester model 70 rifle was made in the year 1979.
your winchester model 70xtr was made by winchester in 1984.
The XTR suffix was on the model 70 rifles until 1989.I know there were the model 70 featherweight,The model 70 XTR european featherweight,the model 70 sporter.
Your Winchester model 70 XTR sporter was produced in the year 1988.I am in the process of buying one that is new in the box also.Mine is chambered for the .270 Weatherby Magnum,and was made in the year 1988.
I have a Winchester model 70 that I purchased new in 1979. It's serial # is 1,430,611. Yours was probably produced 3-4 years later.
Depending on condition anywhere from $350 to $500.
1992-1993,for the serial number provided.
Try Proofhouse.com
I have one I purchased new in 86 serial 1825328
1992-1993,with the serial number provided.
$400 and up, depending on condition
The XTR series of rifles were made from 1983-1989 by Winchester including the model 70 rifle.If you would be so inclined.Your serial number would date the year of manufacture of your model 70 rifle.Please include the letter prefix G before the serial number if it is present.Also include a detailed description of the rifles amount of original finish and bore condition.This will go far in determining the value of your Winchester model 70 rifle.