This is a .177 pellet rifle.
Daisy air gun co. makes and sells the Winchester brand of air rifles. I suggest you ask them. "See the link Below"
What is the condition of the winchester. Poor to Excellent? 800X or 800 XS?
It's rated at 660 FPS
This rifle is rated for 363 feet per second (FPS). That is slow in today's world where air rifles exceed 1000 FPS. If this rifle was in EXCELLENT condition and I do mean Excellent it would be worth $50. From 1969-75 Meyer & Grammelspacher of Germany made air rifles for Winchester.
There are several different versions of the Winchester air rifle. There are 1000B, 1000C, 1000SB, 1000X. They all have different values. In order to give you an estimate of value You need to grade it. Is it Poor, Fair, Good, Very Good, or in Excellent shape.
lets start with. Who made the rifle? there are over 100 different companies who have made air rifles.
You can still order 1077 parts from Crosman in New York. See the parts and owners manuals link below. Then contact Crosman Customer service and order your parts.
The Winchester models are sold through Daisy air gun company. The instructions are printed in China, the rifle is made in Turkey. Models 1000, 1028, 1029, 1100, 1250 & 1400 all use the exact same instruction sheet
In excellent condition it would be worth between $90 - $105
Crosman still has parts for this rifle. contact Crosman at the link below (Customer service) and order the parts you need.
At present, Daisy air gun co distributes and services Winchester air rifles. From 1969 to 1975 Winchester imported eight different models from Meyer & Grammelspacher in Germany. Yours is one of them. It's a Diana model 27.