What is a 06/20

[Mark1]

Originally Posted by Ron Wood

The Swiss started producing their own Lugers with their own tooling in 1918. Due to an error on the part of an early author the date was thought to be 1924 so folks still refer to them as 06/24 (a designation that I and others are still trying to get rid of). To decrease production costs the Swiss redesigned the Luger in 1929.

Ron,
I've found your posts on this subject very interesting over the years. A couple of questions if I may.
Is this 06/20 title for the German made Swiss commercials, a valid one ?

John Walter in his Encyclopaedia.... calls the first Swiss made guns, from 1918, "06 W+F".
The Waffenfabrik Bern then made some changes to the top surface of the breechblock and the sideplate which Walter says had the factory designation of "06/24 W+F". What's your view on that ?