Thanks Eswube. I'm looking for some "not-so-vehicles" french siege/fortress guns, but until now, they are not so clear for the reduction to FD scale. But my next gun is not so old...
I think that the next WWII era mount was missing in our data, a classic in every battlefield involving the western allies, the useful M55 quad MaDeuce mount:
And back to my prefered era, the most powerful gun in the Dardanelles, the Krupp 35 1/2 cm L35 gun, it was the main gun in 3 forts (one per fort) in the area. It was also found in the Bosphorus area.