What Watches Did WW2 Pilots Actually Wear? RAF and Luftwaffe Compared

No single watch served every World War II pilot: RAF airmen carried British 6B/159 and American A-11 watches, while Luftwaffe crews navigated with large B-Uhr observation watches.

A pilot’s wrist in 1943 held whatever his service could supply that month — and the two air forces solved the problem from opposite directions. Britain mixed home-grown and American specifications, chasing accuracy as navigation demands grew. Germany standardized one giant navigation instrument and handed it to the men who actually needed to plot a course. The result is a pair of watch traditions that look nothing alike, and a pile of myths about who wore what.

What follows is what the surviving records and manufacturer archives actually document — issue by issue, role by role.

What Watches Did RAF Pilots Wear?

RAF aircrew wore several different service watches, and the exact model depended on role, supplier, and date rather than one official pattern. The two best-documented families are the American A-11 pattern and the British 6B/159.

The A-11 was a U.S. military specification built mainly by Elgin, Waltham, and Bulova. Typical examples ran roughly 30–32 mm across, with black dials, white Arabic numerals, a central seconds hand, and a 60-minute track. Allied airmen flew with them widely, including RAF personnel, though the A-11 was never an exclusively British model. Commonwealth examples could carry the 6B designation.

British 6B/159 watches came from Omega, Longines, and Jaeger-LeCoultre. Documented features included white or black dials, Arabic numerals, central seconds, blue-steel hands, and cases built from Duralumin — an aluminum alloy — paired with steel backs. These were RAF service watches, but not identical models wearing a single maker’s name.

Later, the British Ministry of Defence judged the broad A-11 specification too imprecise for navigation and introduced the 6B/346 standard. The resulting Mark XI came from IWC and Jaeger-LeCoultre, with chronometer-grade performance, anti-magnetic protection, central seconds, and hacking seconds. One correction before it spreads further: IWC states the Mark XI was first manufactured in 1948, with RAF supply to airborne personnel beginning by November 1949. It served until 1981. Early dials used radium; a white triangle at 12 o’clock arrived in the 1952 design change, and tritium dials marked with an encircled “T” replaced radium from 1963. The Mark XI belongs to the postwar RAF, not ordinary wartime issue.

What Was The Luftwaffe B-Uhr?

The B-Uhr, short for Beobachtungsuhr or “observation watch,” was the Luftwaffe’s standardized navigation instrument, and it was built to be read and operated in a cockpit rather than worn as everyday jewelry. Five authorized manufacturers produced it: A. Lange & Söhne, IWC, Laco, Stowa, and Wempe.

Its role matters more than its fame. The B-Uhr was principally associated with navigators and observers, especially on bomber and reconnaissance missions — not a personal wristwatch handed to every fighter pilot. Crews often wore it over a flight jacket or secured it in a cockpit mount.

The shared specification was strict: a 55 mm case, hand-wound movement with central seconds, an oversized crown operable with gloves, hacking seconds for synchronization, Breguet overcoil balance springs, chronometer testing, a highly legible dial, luminous hands and markers, and an extra-long leather strap sized to fit over clothing. Case markings commonly read FL 23883.

Two dial generations exist. Baumuster Type A ran from 1940 to 1941, using conventional hour numerals with a triangle and two dots at 12 o’clock. Baumuster Type B appeared from 1941 and added an inner hour scale inside a prominent outer minute scale. Both layouts were navigation tools, and neither should be confused with the compact civilian “pilot watch” designs that borrowed the look decades later. IWC’s wartime B-Uhr carried the reference IW431.

Aviation chronographs were a separate category. Hanhart and Tutima built them for Luftwaffe personnel — Hanhart examples from 1939, Tutima from 1941 — and both single- and dual-pusher configurations existed. A chronograph timed a leg of the flight; a B-Uhr told the navigator where he was.

RAF And Luftwaffe Pilot Watches Side By Side

Set the two traditions against each other and the design logic becomes obvious: one service optimized for a wrist, the other for a navigation station.

IWC’s own historical reference material documents the Mark XI’s production dates and dial changes, and it is worth reading directly if the RAF timeline matters to you. Fellows’ auction research covers the Luftwaffe side in similar detail, including the FL 23883 marking. IWC’s pilot’s watch historical references lay out the 1948 manufacture date and the 1949 RAF delivery plainly.

The practical upshot for a collector or reenactor: know which seat the watch belonged to. If you want a modern piece that carries the wartime look without the 55 mm bulk or the radium, our tested WW2 pilot watch roundup walks through the current options and what each one actually reproduces.

Which Wartime Watch Myths Should You Discard?

Two errors account for most of the confusion online, and both come from compressing a messy supply chain into a tidy story.

The first is treating the IWC Mark XI as a standard World War II RAF watch. It wasn’t — manufacture began in 1948, three years after the war ended.

The second is picturing every B-Uhr as a fighter pilot’s personal wristwatch. Its main job was navigation, and it was issued chiefly to the men doing that job. Fighter pilots flew with what their unit could supply, which varied widely.

The honest summary: RAF and Luftwaffe personnel never shared one universal pilot’s watch. Issue depended on role, supplier, date, and plain availability — and the watches that survived tell that story better than any single model name can.