Mystery Early 1960s German 3/4

Going back about 10-12 years ago, I had two basses pass through the shop from the same maker. One had been refinished brown and the other had its original vibrant wine red spirit varnish finish, a little brighter than the bass shown here. The maker and his wife made a good many of these instruments during the late 1950s through the 1960s. They were immigrants from Eastern Germany and settled in Western Germany. He was one of the first to proudly use a spray gun to varnish his instruments, much to the annoyance of the more traditional craftspeople in the area. There was even a nice magazine feature article on him done during the 1960s that featured his new efficient manner of applying varnish. He labeled some of his basses, but most were anonymous inside. The odd tuning machines shown in the photos were grafted onto the existing halfplates in the early 1980s. The one label inside is "Handarbeit aus Mittenwald Made in Germany". The maker's name should be on the tip of my tongue, but that might be the part that the cat got. Does this bass look at all familiar, or does the brief outline of what I remember? I would appreciate a good memory jog. Thank you in advance !!

 

I don't like to do that. It keeps me from grinding my teeth or getting dyspepsia.