Hi, guys,
Cdbeaver, I think you are referring to the 62 and 62 A. The 63 (AFAIK there is no 63A) is a semi auto with a buttstock tube magazine and the operating rod sticking out the front of the foreend. It was originallly the Model 1903, the small version of the Model 1905, 1907, etc., and was chambered for the .22 WRF. The 63 is almost identical, but is chambered for the .22 LR.
They were originally made from 1933 to 1958, and some were made around 1997 in a short term revival. I don't own one now, but once did. They are pretty good little guns, but the originals are of more interest today to collectors than to shooters.
I had a Nylon 66 at the time also, and liked it better for a "using" .22 semi-auto, though the workmanship on the old Winchester was superb. ("Workmanship" is not a term usually associated with the Nylon 66, though their reliability is legendary.)
Just FYI, both Winchester and Remington adopted their own .22 RF cartridges in the early 20th century because at that time the quality of .22 LR ammo was terrible. With their own rounds, which they made, the major companies could control ammo quality.
Jim