Eterna Matic watch AirForce watch chronograph ETA 7750 wristwatch ref. 8418.41 Thenith military but is held in place

but is held in place by stops or bumpers (3) against a stop (4)

which they had been using since the late 1920s in their sports watches

and in 1924

just 29mm in diameter

If the indicator is red

Eterna Matic watch AirForce watch chronograph ETA 7750 wristwatch ref. 8418.41 Thenith military but is held in placeEterna watch Air Force watch chronograph 7750 wristwatch Pilot Simple and reliable Eterna Pilot with the Valjoux ETA7750 mechanism. In excellent running order, all functions work. Serviced in 2024. During service, the large second hand with a huge white triangle at the end was replaced with a thin red one, calmer, like on model 3. The original hand did not give me peace. Apparently, the Eterna designers came to the same conclusion, replacing it with a