A <a href="https://en.wikipedia.org/wiki/3.7_inch_Mountain_Howitzer" class="extiw" title="en:3.7 inch Mountain Howitzer">3.7 inch Mountain Howitzer</a> at the Firepower museum in London.
Photo by Max Smith (<a href="https://en.wikipedia.org/wiki/User:Megapixie" class="extiw" title="en:User:Megapixie">en:User:Megapixie</a>)
from en Wiki