AN5740 24h Night & Day

We have reprinted the masterpiece AN5740 Master Navigation Watch so that it can be used not only as a pocket watch but also as a wristwatch.
A navigation pocket watch used by the U.S. Army and Navy during World War II.
The model name is "AN5740". "A" stands for ARMY, and "N stands for Navy. We attached a specialized case to this pocket watch to create a watch that can be enjoyed as both a wristwatch and a pocket watch. (Design registration)
Even in modern times, there are pocket watches wrapped in leather covers to turn them into wristwatches. However, it inevitably ends up being large and bulky. The strap cover hides the shape of the pocket watch and spoils the original shape and atmosphere of the pocket watch. The method of welding the lugs is certainly simple, but as a pocket watch, it is no less fun. With this product, you can enjoy it both as a pocket watch and as a wristwatch. Unlike the black dial AN5740, this is a reprint of the text version, which is said to be a ``phantom'' even among enthusiasts, with only a very small number existing. It is extremely rare and there is no doubt that it was given to only a small number of pilots on long-distance strategic bombing missions.
The 24-hour dial is painted black and white for high visibility, and the text version has an excellent design that allows you to intuitively understand the morning and afternoon hours.
It has been resized (diameter reduced by approximately 5mm to 46mm) to make it easier to use as a wristwatch. It has also been reprinted as a battery-powered quartz watch. The large font makes it easy to read the time even on a 24-hour clock.
The BJB listed in the text version is not yet known to be accurate. There is also a theory that it is named after a strategic bombing force called the "Berlin Japan Bomber."

Specification　AN5740 24h Black
24-hour quartz movement: Made in Ronda, Switzerland - Carrying frequency (normal temperature): Average monthly difference of 15 seconds (standard)
Watch case body Watch cover: Brass IP silver 
Waterproof 3ATM (3 ATM waterproof): Daily waterproof level.
Windproof: Dome-shaped mineral glass
Battery used: Silver oxide battery SR920SW ・Battery life: Approximately 2 years
Watch head size:Width 46mm*Height 56mm*Thickness 16mm