Mike Irwin
Member
A few months ago you and I were talking about when S&W adopted the hammer block on the side plate.
Just found some information about it in Roy Jinks book.
On page 165, in a photo caption:
"The two styles of Smith & Wesson hammer blocks. Top illustrates the 1915 hand-operated cylinder stop called the wing style hammer block. Bottom illustrates the rebound slide hammer block incorporated in December 1944."
There's also some narrative pertaining to the design change on page 164.
If we go by that date, it looks like that would be the primarly reason for the "Fourth Change" Model of 1905 in 1915 in the .38 M&P line.
Just found some information about it in Roy Jinks book.
On page 165, in a photo caption:
"The two styles of Smith & Wesson hammer blocks. Top illustrates the 1915 hand-operated cylinder stop called the wing style hammer block. Bottom illustrates the rebound slide hammer block incorporated in December 1944."
There's also some narrative pertaining to the design change on page 164.
If we go by that date, it looks like that would be the primarly reason for the "Fourth Change" Model of 1905 in 1915 in the .38 M&P line.
