Hi Gav,
Unbelievable that such a beautfully drawn picture would be found in such a place! I thought such things happened only about a zillion yesterdays ago. I think these are the best finds.
Also unbelievable that there are no observations with more information on this as many enthusiasts as we have on artillery, but perhaps there are not as many as I have suspected.
In any case, a very nice item that does go well in artillery or period grouping.
What little exposure I ever had to artillery was an old cannonball from the war of 1812 I bought in New Orleans. As I recall it caused quite a stir in airport security, not to mention the weight, and my wifes grumbling about it!!
All the best,
Jim