Barrel flat - frame size stamps

[Bill Graham]

Originally Posted by Erick Dorr

Do you have the original barrels for your gun to take measurements from?
erick

Yes. The original barrels are stamped 1 1/2 as well. I'm assuming the frame size is 1 1/2 since the serial numbers all match, but I haven't measured the distance between the pins or other areas yet.

[Bill Murphy]

What rib marking is on the 5-10 barrels? Specifically, the type of steel.