Bill Groves, 91, has been fixing watches and clocks for 72 years but has never tackled a job as big as the Rotorua i-SITE clock.
"This was a major job for me, I've done similar jobs in the past but nothing on this scale."
Mr Groves put three weeks of work into the clock and had it running on Monday September 18, after it was stopped to allow Fletcher Construction to earthquake-proof the tower.
Then on Tuesday last week, Bill discovered that the clock had stopped working again, only to find out someone had forgotten to wind it.
Alan Richards from Stihl Rotorua, which is contracted by Rotorua Lakes Council to maintain and wind the clock, said Mr Groves was quite the character.