Thanks to all who replyed with info.
OWD, tight as a tick, not for sale, no worries.
Marc, thanks for th catalogue page- invaluable.
Franc Otte- see Geffory Gournet's site for more info.
The gun is a war trophy, purchased from a gentelman who had it in his possession since 1964, who purchased it from the officer who picked it from the piles of firearms being destroyed at the end of the war. Not fired since at least 1964 per report. Great condition, well maintained, minor damage to the lock pins from removal for maintenance. I have not had the locks off of the gun.
Gun is original condition and has been inspected by a knowledgeable gunsmith.