The Flieger Type is a family of pilot watches built around the German B-Uhr standard, short for Beobachtungs-Uhren, or observation watches. In the late 1930s and into the 1940s the Reichsluftfahrtministerium laid down a strict brief for Luftwaffe navigators: a large 55mm case, a matte black dial to kill reflections, an oversized grooved crown that could be worked with flight gloves, hacking seconds for synchronising missions, and a long leather strap to wear over a jacket cuff. Two dial layouts emerged. Baumuster A carries a triangle flanked by two dots at twelve with Arabic numerals one through eleven, while Baumuster B, introduced in 1941, pushes a big outer 0-60 minute scale to the edge and tucks the hours onto a smaller inner ring.
Five makers built the originals: A. Lange & Sohne, Laco, Stowa, Wempe and, as the lone Swiss supplier, IWC, with the ordnance number FL 23883 engraved on the case flank. Today Stowa keeps the line alive with the Flieger Verus 36 from roughly £800 and Vintage and Klassik pieces running from about EUR 1,250 to EUR 1,750. Laco spans a wide field, from sub-£400 entry pieces up to the faithful 55mm Original Replica 55 (FL 23883) that lists near £3,300. At the top, IWC's Big Pilot's Watch 43 (IW329301) sits around £7,200 and the slimmer Mark XX (IW328201) near £4,900, while Sinn's tool-focused 856 lands around £1,600.
When buying, start with diameter. The original 55mm is a display piece, so for daily wear most collectors land between 36mm and 44mm. Decide between Baumuster A and B by eye: the A reads cleaner and dresses up more easily, while the B foregrounds the minutes and can look busier on the wrist. Look for a blasted case, quality Super-LumiNova and a hand-wound movement if you want the historical feel, or an automatic for everyday convenience. The Flieger suits anyone who wants an honest, low-fuss tool watch that pairs naturally with leather or a NATO strap.
It helps to separate two terms that get blurred. Strictly, the B-Uhr is the 55mm observation watch, while Flieger is the broader aesthetic now shrunk to wearable sizes. A. Lange & Sohne no longer makes tool fliegers, having moved to high horology, so the value-led, historically accurate choices today cluster around Laco, Stowa, Archimede and Sinn, with IWC carrying the Big Pilot lineage at the luxury end.