4"/40 (10.2 cm) QF Marks IV, XII and XXII
Pictures
Updated 15 December 2013
4"/40 (10.2 cm) Mark IV gun at the Imperial
War Museum in London, UK
This gun from the destroyer HMS Lance
is credited with firing the first British warshot of World War I when HMS
Lance and the scout cruiser HMS Amphion sank the German auxiliary minelayer
Königin Luise on 5 August 1914
Photograph copyrighted by Vladimir Yakubov
Rear view of 4"/40 (10.2 cm) gun from HMS
Lance
Note the cross-sectioned 12" (30.5 cm)
Common projectile
IWM Photograph Q 20542
HMS Lennox
4" (10.2 cm) guns are in "A", "Q" and
"X" positions
WSS Photograph
HMS Thunderbolt with 4"/40 (10.2 cm) Mark
XII in 1941
Photograph copyrighted by John Lambert
4"/40 (10.2 cm) Mark XII on Submarine L33
Note how the entire gun platform rotated
with the gun, thus ensuring adequate working space
Photograph from the collection of Dave
Perkins and used here by his kind permission