No doubt this is a stretch, but there were three Turkish Armenian brothers that were jewelry manufacturers in New York City in the correct time frame. Their surname was Voskerchian or Voskerjian. Roughly because of penmanship from the source and likely spelling problems as well as anglicizations, their first names were Harry (Haroutun?), Roupen, and Kachig (Krekor?).
Haroutun has a 1929 patent relating to broaches, Patent number: 1660181.
Just to be clear, this is just a suggestion and is not meant to positively provide an attribution for the V Bros stamp.