Trove Australia tweeted a picture of an unknown object.
Another new object in Trove from the Waterworth Optical Collection – but this object is “unknown”. What do you think this mystery object could be? Give us your best guess in the comments!https://t.co/PqUKWF6w6b pic.twitter.com/3IxtFMGGsJ
— Trove (@TroveAustralia) November 23, 2017
The researchers at pureandapplied wasted no time digging up some archival footage that explained what it was for.