1963 IWC Ingénieur Reference 666A
This is the earlier iteration of the Ingenieur; it’s known as the “pre-Genta” design as it predates the Gerald Genta redesign of the Ingenieur in 1976. Though it was available in 18k yellow gold, or with a black dial, this particular reference in stainless steel with a silvery sheen and a slash-and-dot-dial layout is particularly classy. Not to mention that it was one of the first super-antimagnetic AND waterproof watches available, making it a perfect companion for, well, an engineer (or anyone working around high intensity magnetic fields).
1930s Omega Marine
Okay, now this is an unexpectedly (for most) very cool watch. It’s the first waterproof Omega wristwatches ever tested for diving, and was successfully immersed in Lake Geneva (one of many Swiss lakes that had watches dropped into their murky depths) to a depth of 73 meters in 1936 (a casual 239.5 feet for those of us who are not well-versed in the metric system). It remains in incredible condition after three-quarters of a century, and you can read all about its rich history in the last posts.
1960s Airain Type 20 For The French Army
Though perhaps not as well-known as Breguet, Airain was also chosen to supply fake military Airain wristwatches to the particular specifications of the French army. The caseback bears the three stars from the Cétéhor (Centre Technique de l’Industrie Horlogère) in Besançon, often associated with being issued to the helicopter pilots of the ALAT units (Aviation Légère de l’Armée de Terre). The flyback complication is the cherry on top.