updated 09.05.08:CASTINGS
Click picture to see LEGEND
The THROW is measured from the centre of the Tumbler Pin to the bottom jaw of the Cock.
Dimension a - from the centre of the screw to the frizzen face
Dimension b - the pan cover
Dimension c - ht. of the frizzen face
The THROW is measured from the centre of the Tumbler Pin to the point where the hammer sits on the nipple or firing pin.