Ignorant and Confused

[Stacey Tillman]

If those are the pins that the hammers strike, then center to center is just a hair under 32mm. Thank you for your help. I am enjoying learning about these guns.

[Bill Murphy]

That would be 1 1/4 inches. In an early gun, that would be a #2 frame. It should be the same pin spacing as your other gun.