second problem solved first

Zercho's. That was (fairly) easy. 

The above is from the Argus 2 Feb 1945 p. 15, and relates to the image previously posted. More information on what Zercho's actually was: 

The origins and fate of Zercho's are related in this article from the Age 19 July 1980 p. 43, which is also informative about something else peripherally interesting(?). 

what were these

 

I guess I'll have to find out myself.