Board Thread:Wikia Discussion/@comment-25683568-20150318062713/@comment-25683568-20150620175315

^ as がか says, 13号 is what's used in the game (and they were called that in reality). If we use disregard what the game calls things then the 10cm Twin High-angle Gun Mount would be the 65 Caliber Type 98 10cm Twin High-angle Gun Mount (wow that's long).