This medical / hospital instrument was used in the Tawonga District General Hospital which was built in the 1950s specifically for the increase in population due to the Kiewa Hydro Scheme.Historical: Shows the development of scientific hospital equipment. Provenance: Used in the Tawonga District General Hospital which was remote and therefore required good equipment. Good condition and good interpretation capacity.Stainless steel mouth gag used to hold the mouth open during surgery. e.g.. taking out the tonsils Some rubber on two curved parts. Too complicated to describe - see photo.hospital equipment. medical equipment. tawonga. mt beauty. tonsils. mouth gag. boyle-davis. surgery