At the posted coordinates you be at the Taieri Lookout and will find a rock with a logo and plaque.
The cache can be found at:
S 45° 5(D-F).(H+A)(F+J)(G-J)′
E 170° 2(B+F).(H+F)(E+J)(C-F)′
AB = number of 'cogs' around the logo
C = number of 'spokes'
D = number of words on the logo
E = number of words on the plaque
FGHJ = year on the plaque
Check sum A+B+C+D+E+F+G+H+J = 35