Below is the link to the NZAHAA e-Gazette for February 2015.  It comments on:

THE MERCANTILE MARINE WAR MEDAL 1914-18

It has plenty of pictures and talks a lot about guns

HOKIANGA KRUPP HOWITZER m1902 No 356 Hokianga World War One Memoria

BATTLE OF WATERLOO 200TH ANNIVERSARY COMMEMMORATION

Click here to view the article.