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From your description I believe that you have a Winchester Model 63. Below is a link to our parts list that has a breakdown that you can compare your gun against. According to The Blue Book of Gun Values 174,692 were made between 1933-1958. The exact date of manufacture I am ot able to provide.
FURTHERING THE LEGACY, ONE PART AT A TIME
That looks like it! Thanks! Is there anyway to narrow the date down?
Actually, it's a Model 1903, manufactured in 1923--the same year my mom was born. I dug a little deeper into some gun collecting books and the Winchester web site. The Model 1903 was chambered for the Winchester .22 automatic shell, the Model 63 was chambered for a .22 lr. This gun is chambered for the .22 Win. automatic only.