Ki-51 Sonia - armament question

[bodozec]

Every source available to me stated that Sonia's forward-firing Type 97 machine guns
was replaced with 2×12.7mm Ho-103 in later models.



Does anybody know the exact date of this modification ?

[Shinpachi]

ただし翼内7.7mm機銃は実戦投入後に空戦及び地上銃撃時の威力不足が指摘されたため、大戦後半（194 3年（昭和18年）11月）より12.7mm機関砲（ホ103：一式十二・七粍固定機関砲）に換装された（ Wiki）。

It was November, 1943.

[bodozec]

Thank you very much

[Shinpachi]

You are welcome!