The caption (subject to correction from Yu-sama or Shinji) reads “Interceptor Raiden [Thunderbolt] Type 21 (J2M3).” Two aircraft are provided for: Tail Number Yo-J2-34 of the Yokosuka Naval Air Technical Arsenal as of 1943 (Showa 18) and Tail Number 20 of the 352nd Naval Air Group (Kōkutai) as of 1944 (Showa 19).
More later when I have time.
Don
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