My new Winchester

[deldriver]

There were other companies that used a thumbnail pattern on the top of their rear sight so be careful about saying it's Winchester every time. As Charlie stated, the first thing to look at, if possible, is a side profile looking for a round ear design, also look at the staking around the pin to see if it matches yours.

Remember, odd things happened in production so just because a book, internet site or even one of us says it should be, it might not necessarily be that way every time.