I believe Steve Barnett has offered a Dumoulin once or twice with a rounded action. It looks much like Gunwolf's gun . Compared to "normal" Dumoulin sidelocks, this action has rounded edges . I would call it a rounded action. See Steve Barnett's "round" action Dumoulin.

https://stevebarnettfineguns.com/dumoili...on-sxs-12-gauge

As to the date mark, I ,too, have found a couple of guns from the mid to late 40s proofed. Those trying times must have had special rules, but I don't know what they were.

Last edited by Daryl Hallquist; 04/09/18 04:13 PM.
http://www.bakercollectors.com/