IMHO, if 61 is the serial number, it falls into the first Lindner serial number sequence, A&D makes it post 1874, and the absence of the first Lindner mark dates it pre-1877. So, Heinrich's father Georg was controlling production at that time, and figuring approx. 15 guns per month production, makes it possibly made in 1875.

Or not, we'll see when Raimey jumps in. grin

Regards
Ken

I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.