On ebay there is this guitar for sale :
http://www.ebay.de/itm/Jazzgitarre-Arch ... 46045b9109
Would it be posiible that W.M.M is short for Wenzel Meinl, Markneukirchen who had a business that later became VMI ?
W.M.M. Spezial Gitarre
Moderatoren: Heidrun Eichler, Johannes Meinel, STELOL