Hermes is swedish indeed, it was the "first" mark of Nymans Verkstäder in Uppsala (800 m from my home) before WWII. After the war it had to part that honour with Crescent, acq. by Nymans 1931. It ceased - as far as I understand - in 1965 when all bicycle fabrication of the Monark-Crescent company moved from Uppsala to Varberg on the west coast.
I have in front of me a nice photograph from 1951 with swedish prime minister Tage Erlander on his 50th anniversary having recieved an exact copy of the bike on ebay as a present from the workers union in Uppsala.
The dynohub is an in-house constructionfrom 1949 named Nymodyn.
My son has a copy of the bike without dynohub - that was an extra option - and likes it very much.
My father - who grew up in Uppsala - had a red racing bike named Mercurius (latin version of Hermes) from the 1930´s made by Hermes esp. for the Uppsala bike club. Unfortunately he had the bad taste to give it away when we moved in 1957 and I - being 14 - didn´t understand better.