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It never fails to amaze me, when I see a receiver-sighted rifle w/o it's rear bbl open sight removed for a clean sight picture & a slot filler blank installed in it's place.
It's been documented that Winchester made the 2 receiver peep sight prep holes standard on the Model 94 in the SN 1,790,000 range, until the 1983 intro of the Model 94AE.
(IIRC, they were standard earlier on Model 64's)
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