Talk:38cm Quadruple Gun Mount/@comment-24093250-20170811171003/@comment-1915363-20170821031810

It's because the gun calibers in France was listed in cm in Japanese sources, if the Japanese Wikipedia is of any indication. It's probably a hangover term from the Kriegsmarine's intel, since IJN was allied to them and whatever they knew of Richelieu comes from them, along with the incorrect measure.