The search for the Hercules comes up on Google, the Avika verkin was a mower brought into the country many years ago, I used to assemble them in the early 1950's but couldn't read the instructions because of the language, they were mainly 3pt. linkage.
I suspect they may have changed the name to Hercules, because if my memory serves me correctly, they stopped coming in under that brand name and the Hercules came in its place.