Two R. & H. Green & Silley Weir mechanical engineers at work in the engine room on board an unknown ship.

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 are dismantling an item marked No. 1 and one of the men may be using a box spanner. To the right is an item marked F1. The location may be any of the docks in the Port of London or in Falmouth.