Updated 26 December 2008

A turret on HMS Dreadnought
Note large gunport openings, sighting hoods and 12-pdr 18cwt guns atop the turret
Bain News Service Photograph
Library of Congress Photograph ID LC-DIG-ggbain-17494

HMS Indomitable circa 1910
Bain News Service Photograph
Library of Congress Photograph ID LC-DIG-ggbain-16724

Bow Turret of HMAS Australia in 1918
Note the Declination Marks, sighting hoods and the built-up nature of the gun barrels
IWM Photograph Q18740

Another view of the same turret on HMAS Australia in 1917
Note the added armor on the turret top
IWM Photograph Q18717

Various pictures of 12" (30.5 cm) guns and projectiles aboard HMAS Australia
Search via "H01964", "RELAWM07947", "EN0010," "EN0011", "EN0012", "EN0013", "EN0014", "EN0015", "EN0529" and "EN0530"