There is some good info on Wilhelm Herwig available form the Museum Markneukirchen. He was a musician and wholesaler. He was not a maker but sourced the instruments mostly form individuals who made them at home in a spare room, as was a common practice in Markneukirchen.
This is somewhat different from Dilworth where he is also a maker: "HERWIG, Wilhelm Worked 1890-1930 Markneukirchen Germany. Maker and wholesaler of violins and accessories. Business founded 1890."
And then there is Corilon, where a Herwig violin was sold with a description: "This antique handcrafted string instrument from the turn of the century c1900 was made by the Markneukirchen luthier Wilhelm Herwig. The violin bears the original label "Wilhelm Herwig in Markneukirchen". The violin is patterend on the model of Stradivari and features a rather slim neck and typical, softly rounded edges made in the Markneukirchen style. The attractive varnish is of a shiny, reddish brown color over golden yellow ground. Herwig added a decent antique finish to his work."
Mine is very different from the Corilon example anyways. I don't have "softly rounded edges made in the MArkneukirchen style" and my purfling shows a rather large portion of white with slim blacks. All in all I thought mine was rather un-typical for the time and region.
As the circular brand mark did not seem to be connected to the Herwig label I thought, the brand mark was the actual maker?
Many thanks, luthier, for identifying the circular brand as "Heinrich Theodor Heberlein Jr".
Looking on from this I find 38 auction results at Brompton's for this maker with violins made between 1881 and 1965. Really???
Also, Corilon (again) had one for sale form the early 1960s. I see more similarities with this than with the older ones.
Could mine be younger than I thought? Maybe even post WW2? But that would not fit with the Herwig label and the old German letter type.
But then again, Herwig's business was still around and was eventually acquired 1972 by MUSIMA. Could they have had a stack of old labels left which they continued to use after WW2? Was I right in my first impression that the violin doesn't look like a Markneukirchen trade fiddle from around 1900 at all?
Getting close. Who can solve it?