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Letters on the 1st pic were not written by Japanese as they look too Japanese and not natural.
百二十四 means 124 but Japanese factory workers or military ground crew wrote it 一二四 or 124.
They did not write 101~18 but 101-18 either if it means anything.
There are four on display in England
Very interesting story, Grant.Interesting, Shin, thank you. This Ohka's history is not immediately known beyond it arriving in the UK and might have been captured at Seletar in Singapore. It is listed as having the serial number 15-1585, but where this comes from is not known. It was in the Science Museum at South Kensington for a while but was transferred to the FAA Museum at Yeovilton in 1982, where it is going to undergo a comprehensive restoration. The unrestored patches in the photo above have raised questions as to their meaning, which has caused the curators to request assistance from outside for accuracy in determining the markings and their purpose.
Love the simplicity of the instrument panel, stripped to the essentials. Not sure whether the the Japanese characters are legible enough to be translated?
View attachment 633533
I think it can be read like this roughly