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AN5740
AN5740 24H Night & Day
This version features a stainless-steel case and outer cover with a sapphire crystal.
€224,45 EURNo extra charge
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Shipping to the UK, France, Germany, Spain & the Netherlands
Free Standard shipping on orders of JPY 40,000 or more after discounts.
Standard — Air Packet: from JPY 1,200; approximately 2–4 weeks after dispatch. Customs clearance may add 2 weeks or more.
Express — EMS: from JPY 3,500; around 10 days after dispatch, plus customs clearance (which may add 2 weeks or more). Express remains chargeable.
Import duties, VAT and customs clearance fees are not prepaid and may be payable by the recipient. Delivery estimates are not guaranteed; customs delays may occur. The threshold is set in JPY; the equivalent in your selected currency is calculated at checkout.
Shipping details1-year warranty (excluding exterior parts and glass) · Repair support
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HISTORY & DESIGN
The history and details behind this watch.
This version features a stainless-steel case and outer cover with a sapphire crystal.
We recreated the AN5740 Master Navigation Watch so it can be enjoyed as both a pocket watch and a wristwatch.
The original navigation pocket watch was used by the U.S. Army and Navy during World War II. In the designation “AN5740,” “A” stands for Army and “N” for Navy. Our dedicated outer case allows the watch to move between pocket and wrist use. The design is registered.
Wrapping a pocket watch in a leather wrist cover can make it bulky and conceal its original shape and character. Welding on lugs is simpler, but permanently changes its use as a pocket watch. Our approach preserves the pleasure of both forms.
The Night & Day dial recreates a rare design that our original account describes as scarcely surviving even among collectors. It is associated with a small number of pilots flying long-range strategic bombing missions. Its black-and-white 24-hour layout helps the wearer distinguish AM from PM intuitively.
To make the watch easier to wear on the wrist, we reduced the diameter by approximately 5 mm to 46 mm. This version uses a battery-powered quartz movement. The large dial helps keep the 24-hour display easy to read.
The meaning of “B.J.B.” on the dial remains uncertain. One theory connects it with “Berlin-Japan Bomber” and strategic bombing units; it should be treated as a theory, not an established explanation.
Product specifications — AN5740 24H Night & Day
Movement: Swiss Ronda 24-hour quartz movement. Accuracy at room temperature: 15 seconds per month (reference value).
Case: Stainless steel.
Battery: Silver-oxide SR920SW. Approximate battery life: 2 years.
Water resistance: 3 ATM. For everyday use; not a deep-water diving watch.
Crystal: Domed sapphire crystal.
Case dimensions: 46 mm wide × 56 mm long × 16 mm thick.
Outer cover: Stainless steel. Shipping is currently paused. This preview does not accept orders.