FYI...This closeup shows the old style 'short' hammer with it's distinctive, more severe 'S' shape to the hammer's body because of it's short length.
The improved taller hammer measures 1+13/16" from the very bottom edge of the hammer to the edge of the bottom jaw, and has a longer, more gentle 'S' shape because of it's longer length.
In addition, the closeup shows the old style case colored frizzen...replacement design frizzens are all black;
http://www.members.aol.com/wjcutbush/tcflintlockasm.jpg
The improved taller hammer measures 1+13/16" from the very bottom edge of the hammer to the edge of the bottom jaw, and has a longer, more gentle 'S' shape because of it's longer length.
In addition, the closeup shows the old style case colored frizzen...replacement design frizzens are all black;
http://www.members.aol.com/wjcutbush/tcflintlockasm.jpg