Batavus is a dutch racin cycle manufacturer; The city where their production facilities are is "Heerenveen"

They stopped producing racing bikes long ago. I have a Batavus Criterium which is from 1980.
http://en.wikipedia.org/wiki/Batavus this gives more details.

BTW finding out production year of a bike I could well estimate by looking at the Reynolds decals.
Batavus had Ishiwata tubes in 1980 so maybe that gives a lead.