The 46 cm/45 (18.1") cannons used on the Yamato class were the most powerful guns ever installed on a battleship.
The Japanese "40 cm/45 Type 94 naval gun" (四五口径九四式四〇糎砲 Yonjūgo-kōkei kyūyon-shiki yonjussenchi-hō) was the biggest naval gun used by battleships in World War II. They were actually 46 cm (18.1 in) guns, but were designated 40 cm (15.7 in) in an effort to hide their true size.
Suitable for: WWII Japanese battleship Yamato Class
Real scaled from original
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