A GR system - as per the tvb web page - in operation at Makara (an MF/HF receiving/monitoring site) near Wellington NZ-this came out of service in 1955 and was replaced with the completely home-grown frequency measuring system in the second photograph. http://homepages.ihug.co.nz/~tractorb/GR%20freq%20measuring%20eqpt/ DaveB, NZ