Wordless Wednesday (not quite) -Brickwall photo

This photo definitely includes my grandfather, Denis Kunkel (second left, second back row) and was found as a backing board behind another picture. I have a theory it is be an extended family photo because of some of the poses and family resemblances-some look very like my father. Or it could be some local society -but less likely as it includes women. It was probably taken in the Toowoomba area circa 1917. If anyone thinks they recognise someone in this picture I would LOVE to hear from you. The most likely family names are Kunkel and Gavin (from Pechey). (Click on the photo to enlarge it).

Mystery photo includes Denis Kunkel: are the other people Gavin family members?