Updated 15 December 2013

5.25"/50 (13.4 cm) S4 turret on HMS King George V, ca. 1940
Photograph from Allan C. Green collection of glass negatives
State Library of Victoria Image H91.108/2983

Interior view of a Mark I turret on King George V
Crewmen in the foreground are setting fuzes while the crewman with his back to camera is the turret trainer
Projectiles are removed from the fuze setters from the rear and placed into the loading trays
A poor copy of this picture is used in "Battleship:  The Sinking of the Prince of Wales and the Repulse" to illustrate the cramped conditions of the Mark I gunhouse
IWM photograph A 15889

5.25" (13.4 cm) RP10 Mark I* mountings on HMS Vanguard in 1952
Compare this roomier post-war gunhouse with the ones above
Detail from U.S. Naval Historical Center Photograph # NH 103679

The Erection Shop at Elswick Works on 31 March 1941
The foreground 5.25" (13.4 cm) turrets were mounted on HMS Cleopatra
In the background are 4.5" (11 cm) Mark II mounts for HMS Implacable
Photograph copyrighted by Vickers

Forward 5.25"/50 (13.4 cm) Turrets on HMS Bellona
Note that a Quad 2-pdr and director replaces "Q" turret in this Spartan class cruiser
Photograph from Allan C. Green collection of glass negatives
State Library of Victoria Image Image H91.250/1388

Forward 5.25"/50 (13.4 cm) QF Mark II mountings on HMS Argonaut
IWM photograph

"Long-Trunk" 5.25"/50 (13.4 cm) Mark II Mounting as used on Cruisers
"Short-Trunk" Mountings used on Battleships had a handling room directly below the gunhouse
Sketch from The Gunnery Pocket Book, B.R. 224/45 (1945)
Used here by permission of Historic Naval Ships Association

See 5.25
Squared-off single mountings in this series are Army coastal defense units

16 June 2012 - New datapage
15 December 2013 - Added photographs of HMS Argonaut and interior of mounting