Farewell, gentle possum. In 1997, Barry Humprhies wore these specs in an episode of Dame Edna's Work Experience in which she visited workers at the H.J. Heinz and Company baked beans' factory in Kitt Green, near Wigan.

Dame Edna's oversized and increasingly flamboyant glasses became a hallmark of her style over her years in the public eye. Made by the north London firm Anglo-American Optical, the majority of the glasses created as accessories for her costumes were based on the flame shape or the curly shape. These are an example of the flame shape and, like all the glasses created for her, have no lenses.

Image: thanks to V&A online collection
https://collections.vam.ac.uk/item/O1378012/spectacles-frame-worn-by-barry-spectacle-frames-adnitt-stephen/