Query re Meus target sight

[muffett.2008]

You have a Mues light 3rd model,(improved old model) this was used post WW1,(1920) this sight is in it's standard(nose knocker) configuration.
It varies from the original Mues Patented sight of 1910,( patent No.18073/10) insomuch as the Elevation Screw is threaded thru a centre boss, as opposed to the half nut system of the original patent. Also the elevation fixed arm is duel marked, as opposed to only one marking on the original patent.
Also the windarm is different, being of the later mark with the ability to zero the wind vernier.
This sight is still setup with the short windarm, which means it was attached directly to the rifle, as opposed to using a mounting bracket and longer windarm to maintain the centreline.
The Mues Light model sights were made up until 1934 with only minor changes to the windarm, they were superceded by the Mues Special, the last of John Mues Folding sights.
After Mues lost his courtcase against William Dunne(Central Sights) he began to manufacture fixed arm sights, Climax in 1936 and the Kings in 1938.