I was involved in a discussion of these pistols on a Luger specific site recently. While I didnt bother to make special note, seems like the discussion had settled somewhat on 1920 should be correct rather than 06/24. The above mentioned late teen dates may be just as valid....not for me to say.
However, you will have to use whatever description your pool of buyers recognizes. Really need set of pictures.
Re: matching mag. I have 2 of these, and neither has a numbered magazine, have looked at many over the years & cant ever remember seeing a wood bottom Swiss mfg mag w/serial number. The wooden bottom of these mags are a bit distinctive in their 'machining'......but I have learned to 'never-say-never'......!!!.
There are many, many Swiss Lugers in this country. I see several in similar description as above for sale at every OGCA show I attend. Last discussion I had there w/Luger dealer said $2200., gun only. Another dealer has several w/holsters.........I dont know his prices.