Studio photo of an unknown male

A studio photo of a young male wearing a fob watch buttoned across front of jacket. The photo was taken by Yeoman & Co, Instantaneous Photograph at 48 Errol Street, North Melbourne. The photo was found in an album with many other studio photos, believed to be from the surname Anson

Is anyone related to this young male? Does anyone have knowledge of the photographic studio and when instantaneous photographs were introduced? Also what was the period of fob watches like the one shown in the photo?