Canon de 65 M (montagne) modele 1906 - good choice. It was used up to 1950.

Agreed this is a most useful gun - for colonial conflicts, WW1, warlord armies in China, probably the SCW, WW2 and then by Israel.

In the photos I find of that gun though, the carriage has lots of holes to save weight. So some more work seems necessary on the master.
http://landships.info/landships/artillery_articles.html?load=/landships/artillery_articles/65mm_Mle_1906.html

Great subject. Hopefully the holes could be made in the carriage. I for one, would be very happy to buy the same gun with a chasseur alpine crew. Thus, a set of chasseurs alpine WWI would be a first in plastic.