Another couple of mechanical alternatives are German manufacturers Damasko and Sinn who make a wide range of pilot inspired watches. They may not be the cheapest but they are designed to take alot more knocks, bumps, and be more scratch and dent resistant than your normal watch. Although not household names, both are highly regarded in terms of overall quality and VFM within the watch community.
Damasko - Uhrenmanufaktur - Regensburg/Barbing - Hersteller von mechanischen Armbanduhren.
Sinn-Spezialuhren
More affordable German inspired flieger designs come from Stowa ( historically one of the original companies who made the flieger or B-Uhr design watch ), it's nicely finished but demand exceeds supply on these so expect a 8 week delay from order.
Flieger - STOWA GmbH & Co.KG
or Archimede watches, typical flieger design and comes in a variety of sizes with even a left hand option.
ARCHIMEDE Pilot | Classic Pilots Watches | Automatic + Hand Wound | 4 Sizes 45/42/39/36 mm | Stainless Steel + Pure Titanium