Originally Posted By: crs
MMmmm ? Then what is the little button near the L ?

My Simson Suhl DR has such buttons/pins on each side of the action and they indicate whether the action/hammers are cocked or fired.
Simson saw no need for a labelled pointer -- just pin in or pin out.

Hmm, am quite familiar with cocking indicators but (as with your Simson) not with the D and L nomenclature. I was throwing out an idea in case left and right made any sense. Not so, obviously, if the other side of the action has the same device. Organic chemistry study may have been a waste after-all.