That is excellent, thank you Toritoribe. That matches exactly the story I was told by the person I bought it from that it came from a Japanese Warship at the end of World War 2. The box contains an electrical multi-meter which I have been able to date to July 1941.探信儀室用
for radar room
Tanshingi is a term used in Imperial Japanese Navy, and tanshingishitsu referred to radar room of warship.