Two R. & H. Green & Silley Weir mechanical engineers at work in the engine room on board an unknown ship. They are inside the crankcase of a diesel motor and one of them is working between two dismantled bearings marked A1 and F1. The gloved hand of the other man can be seen holding a ring spanner on a large nut. The location may be any of the docks in the Port of London or in Falmouth.