The one I just blued is 439xxx from 1910, and the one yet to be blued is 739xxx is 1924. I chose to turn the former into the trench gun since it came with the broken barrel extension, so alas it won't have one serialized to the gun. The one I haven't reblued yet only needed a new barrel adjusting sleeve (which it has now). Both barrels are 30 inch full choke. The latter will stay that way. Since it won't be a real trench gun, I'm half tempted to tap the front end for choke inserts to make it more versatile. Lotta work to do yet before I get to that decision point, especially if I need to finish-filing the bayonet adapter myself.
Given the initial condition I found both of these in, it's a real joy bringing them back to life. might need to spring for new wood, depending on how they look when I'm done. The trench gun might just need brass pins in the wrist to complete the look, there is not a crack, but a large splinter in the usual place.