This is the most famous Japanese military wristwatch of the Second World War. “Tensoku” is the abbreviation of “Tentai” and “Kansoku”, meaning “Astronomical Observation”.

For collectors of “militaria” this watch is the great rival of the large aviator’s watch “B-Urhen” made in Germany for the Luftwaffe and were mostly given to Kamikaze pilots explaining why so few watches have survived.

Very legible and with an oversized crown, this watch was an important tool for the pilots. Two variants were produced. One equipped with a 19’’’ (line) and 15 jewels movement and later versions such as this example with 9 jewels.