This photograph shows three men opening a lock, manually using a lock capstan. The men are fit and strong. The river behind them appears to be very high. Not sure what the era is, but is obviously before looks were mechanised. The devise they are using is called a lock capstan.This photograph shows how locks were manually opened to allow river transport to proceed. A black and white photograph of three men working on a lock somewhere on the Murray River in South Australia. The device they are using is called a lock capstan.Written on the back in lead pencil Price. Opening up lock -probably Lock 7, Renmark. Maybe Euston.locks, renmark, euston, price family collection, murray river, capstan, lock capstan