These Goetz dust coats were a heavy navy blue cotton drill, supplied by Jones Workwear of West Footscray. Jones was established in 1893, later renamed Can’t Tear’em P/L. In November 1980, they again changed their name to CTE P/L. A recent web search failed to find any current presence of them. Click images  for larger views

Generic dust coat with embroidered Goetz pocket and visible buttons. 

Another design had hidden buttons and an iron-on Goetz logo, with embroidered employee name. 

Thanks to Terrence Linehan’s daughter Robyn for supplying the coats