This was exciting. It's the first time I've encountered a 1950s Mobil servo in such pristine condition, especially since the Lewis & Skinner signwriting documents I found (see: www.lewisandskinner.com) record the painting of many of similar servos, eg:
There's very little on this property that I've been able to find online - except for a mention in Trove from 1956. Interesting though that there still seem to be a lot of Chapmans in Kongwak.
Here are the other signs I snapped from the area:
This looks like it might have been the former sugar mill. The next ones are from the former general store that now hosts the market:
...and here's one great old shop I snapped in Korumburra, on the way back to Melbourne: