There is no such thing as a Darne type 10 non ejector. Every Darne R model IS an ejector gun. But, they are Darne ejectors, which, are far more sensible, reliable, and useful than just about any other ejector ever dreamed up.
This is a list of Darne serial number by date:
It has so many exceptions, and changes over the years that it is just about useless to anyone who did not work with or in the factory that produced the guns. But, it is a start.
When I take a stab at dating a Darne, I like to have the gun in hand, and examine the proof marks, importers name, or lack of same, on the barrels, and specific features and choke/bore measurements of the gun. Simply having a grade and serial number tells you almost nothing.
Best,
Ted
