I agree that these were engraved by Fritz Heimbeck.
As to the number of drillings and side locks--
I know of no drillings, but know for certain of one side lock. Have heard that there may be another but do not know that for certain.
Anything is possible and since Lindner had an association in Berlin for a time, some guns could have been sold there and we would never hear of them. We do know of the one gun that is inscribed in German and was surely made for the German market.
It is only in recent years that anyone cared about him and his guns. They were sort of buried treasures until a few of us started to shoot off our mouths !!LOL
Best,
John
