Your question can not be answered for several reasons:
You state that it's (Prewar) Which war?
You did not state the model. Winchester has several models.
You did not state the condition of the gun. In fact Winchester has never made a gun only rifles.
Your question is too vague.
The Winchester model 425 was made for Winchester by "Meyer & Grammelspacher" of Germany. The value is determined by the condition of the rifle. without any information about the condition of the pellet rifle, no estimate of value can be determined.
from 1969 to 1975 Winchester imported eight different model Rifles and two guns from Germany. The model, condition and age determine the value. Please repost your question with the model number, and condition for an estimated value.
Requires professional appraisal.
It would be worth around $55 in Excellent condition.
Please state the condition of the rifle so an estimate of value can be given.
In very good condtion it would be worth between $50-$60
25-100 USD
The Winchester 425 was made around 1974. It fires a .22 cal pellet at 500 FPS. Please state the current condition of the rifle to get an estimate of value. Is it in poor, fair, good, very good or excellent condition?
Like all antiques the value is set by the current working and physical condition of the rifle. Please state the answer to these two condition so an estimate of value can be given.
value Winchester 140
I am not sure about the current value, but it is not a 358 Winchester, but is a 356 Winchester.
What is the value of my Winchester 94