A sign at the listed coordinates will give you a history lesson regarding the area's development and will provide you with the answers to the following questions which you will need in order to obtain the coordinates for the nearby cache.
GZ is at:
S 19 11.ABC
E 146 40.DEF
A = Over how many years did the Bohle Plains continue to develop as a rural area (first digit + 2)
B = What year did constructions of the North Coast Railway begin? (last digit)
C = When did the first European settlement occur? (second digit)
D = What family supported the early operations of Bohlevale school? (number of letters in their name not including the 's - 2)
E = How many members of the Schmidt family can be seen in the photo at the bottom right corner of the sign?
F = Since when did suburbanisation come to the fore? (third digit - 2)

Congratulations to Karicka for being the FTF.
