2½ inch S.D. and diaphragm valves in Portsmouth Dockyard, Hampshire.

A study of a 2½ inch S.D. valve and a 2½ inch diaphragm valve photographed against a plywood backboard in Portsmouth Dockyard. viewed from the front. The valves have been split with the base on the left of the main body for each valve.

Object details

ID: N26675
Type: Negative
Materials: Glass plate negative
Display location: Not on display
Date made: 31 May 1948
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 120 mm x 164 mm