1941 Yokosuka Naval Gunnery School Advanced Course of Artillery Calculators Graduation Сommemorative Watch Fob/1941年横須賀海軍砲術學校高等科測的術(幹電班)練習生卒業記念章

Size 50 × 42 mm.

Obverse

高測 - Advanced Calculator

Emblem of advanced calculator specialist /測的術章/: "two crossed rangefinders intertwined with electrical flashes".

reverse

横須賀海軍砲術學校 - Yokosuka Naval Gunnery School

高等科測的術 - Advanced Scientific Methods

卒業記念 - Graduation Сommemorative

(幹電班)練習生 - (Main Electrical Group) Trainee

2601 - 1941

 

Interestingly in 1943/1944 US official recognition manual for field use "Uniforms and Insignia of Imperial Japanese Army and Navy" https://asiamedals.info/threads/uniforms-and-insignia-of-imperial-japanese-army-and-navy.24554/ navy specialist emblem

"Two crossed rangefinders intertwined with electrical flashes"

incorrectly attributed as "Fire control".