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Photograph; glass plate negative

Description:

Photograph, Harland and Wolff glass plate negative. subject : Giant sluice valve, known as a 'swiss' valve in workshop prior to installation between the turbine exhaust opening and the condenser. This photograph was for some time wrongly entitled 'McFarlane Patent Watertight door in Workshop'. Ship No: 433. Name: Britannic. Type: Passenger Ship. Tonnage: 48158. Launch: 26 February 1914. Delivery: 08 December 1915. Owner: Oceanic Steam Navigation Co. [White Star Line]