This 36mm stainless steel Gruen AirFlight Pilot’s watch is a very cool. The dial has apertures that display 12 hour time and 24 hour time at night. These 50s watches were specifically designed for pilots. The manual winding movement was just cleaned and is accurate. The steel case displays very good condition for the age of the watch. I really like the interesting hour hand design on these watches. The AirFlight has a long history as a true tool watch.