1)the smith could afford to keep several complete valve assemblies in stock for every gun he expected to see..not likely for any but a large operation.
2) the gun in question didn't vary during its production life. Depending on when a 1377 was made, some pistons won't work with some valves, and storage volume varied, which would make noticeable difference if just swapped in.
3)the replacement is even available. No more brass 392 valves are available anywhere, so far as I know. Would you want a new aluminum one or a reconditioned brass one in your brass valved gun? I know which one I'd pick...
I'd guess most smiths don't replace the whole assembly if it's not needed, I know Tim doesn't.
This message has been edited by classicalgas from IP address 22.214.171.124 on Dec 28, 2011 7:50 PM