I've found a few oddities. Like English language documentation,
apparent translations from the Dutch manuals, up to and including the repair
sections. Not complete however. Also, a booklet called Introductie FM-Radioapparatuur
3600-serie - dated 1970 - that introduces the system as the replacement
for the VRC/GRC/VRQ/PRC radios.
INTRODUCTIE
FM-RADIOAPPARATUUR
3600-SERIE
21-12-1970
FM-3600
FM-4600
NOMENCLATUUR
1 augustus 1992