Green Island is a suburb to the south of Dunedin. The street clock was a significant feature on the junction of Howden Street and Main South Road by the entrance of what was previously the Green Island Borough Council Offices in the days before amalgamation with Dunedin City.
The Master Clock was a Pulsynetic Long Stroke Master made by Gents of Leicester in England circa 1960. It was a special design exported throughout the British sphere of influence and models brought to New Zealand incorporated features designed to maximise accuracy of timekeeping such as correction for latitude.
Plaque mounted on the base of the structure.
Dual face Slave Clocks
Internal Movement of the slave clocks. These received a one second pulse every 30 seconds from the Master Clock. Unlike modern clock systems, these movements were connected in series and were driven by a regulated 0.3A current from a 48VDC battery bank which had to be maintained on permanent trickle charge..
Following administrative restructuring, in 1992 the office buildings were redeveloped for other purposes so that a new electronic Master Controller system was required. Jira supplied a custom design which provides continuous pulses during a power failure. In 2002 the clock system was given a major overhaul including electro-mechanical servicing and repainting of the clock body..