Your challenge is to find out the year "Uncle" died.
The year is in the form ABCD
Put the required digits into this co-ord and you should find the cache easily.
S 37 25.750 E 144 17.BCD
Take the time to look around at the other head stones.
Some old some not so old.
There is another cache nearby too, called "A Tower Perhaps".
You may be able to get to the general location by 2WD however a 4WD makes the trip much more fun when you keep touring this area.