Boy, was I off a bit..

1922 was the introduction of the Lyman 103 rear sight, which I believe was a precursor to the 29 1/2 and 30 1/2?

https://books.google.com/books?id=C...%20lyman%20windgauge%20sight&f=false

So, considering how uncommon the 103 is, I presume the 29 1/2 and 30 1/2 came pretty quickly.

Last edited by Calhoun; 06/19/17.
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