Talk:General Discussion/@comment-195.184.83.35-20140914155536/@comment-58.187.18.84-20140914162408

The prototype 35.6 and 41 cm are triple cannon turrets, historically only twin cannon turret variant of them were produced.

The 46cm however, was built as triple cannon turret from the start, there's no such thing as a prototype variant of it.

However, there is something like this that existed as prototype.

http://www.navweaps.com/Weapons/WNJAP_20-45.htm