Handbook for 6" breech-loading Mark VII and Mark VIII guns
My copy of this document are color photographs of an original at TNA. My photos are sadly pretty bad of this volume, and some pages border on being totally unreadable. The plates are all in color.
LIST OF PLATES
This book would be very helpful in creating a model of the weapon. Its plates are helpful for modeling, and the text is fairly helpful in general. You might find that it works nicely in conjunction with the Sight Manual of 1916 which will have additional images of the sightsetting and telescope equipment.
According to Navweaps.com, the Mark VII. gun was used on on Formidable, London, Duncan, first five King Edward's, Tiger, Barfleur and Iron Duke classes, also Cressy, Drake, Kent, Hampshire and Challenger cruiser classes and others as rearmed, plus the monitors Severn, Humber, Mersey, M.27, Clive, Craufurd, Eugene, Moore, Rupert and Wolfe. The Mark VIII. was used on the Kent class light cruisers. I'd have to go digging around for information on the mountings referenced within this handbook,
One important background note on naval weapons, and in particular the Royal Navy's weapons of this period, is that small guns like this are often discussed as systems comprised of a gun (which is simply the barrel and breech mechanisms) and a mounting upon which it sits. The RN nomenclature system details guns by the diameter of their bore and a "Mark" designation of a roman numeral. Small changes in a design sometimes do not merit a new Mark number, but are instead denoted by appending stars (asterisks) , e.g.: Mark VII**. Mountings are usually denoted by a roman numeral after a "P.", which may stand for "pedestal", for such is what these man-worked weapon mounts were called. Mountings may also have stars in their designation.