The rifle in this link is up for auction on Proxibid. The serial number should put it close to the transition to drilled and tapped receiver, but the back receiver ring is beveled and from what I understand, should not be factory tapped. The bolt is bent, but that could have done by anyone. The factory tapped receivers I can recall were also tapped closer to the edge where the scope base was flush with the straight edge if the receiver ring. Any thoughts on facory or non factory tapped?
Winchester began drilling and tapping the receiver bridges in October of 1950, at serial number 31763. The rifle you are looking at was manufactured in late September 1950, just days before Winchester made the change to the receiver.
Bert
WACA Historian & Board of Director Member #6571L
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