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 side. Vertical format.

Object details

ID: N26673
Type: Negative
Materials: Glass plate negative
Display location: Not on display
Date made: 31 May 1948
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 164 mm x 120 mm