Gaten Matarazzo plays the character Dustin Henderson since the first season of the Netflix series. In the publicity photo from Seassn 2 on the left, it looks like the Casio logo has been removed or blackened out, we're not sure if this is also the case in the actual watch seen in the series.
The F-91W watch is one of the most classic Casio models. It was designed in 1989 and now 30 years later, with exactly the same design, it is still very popular.
Dev Patel wears a Casio Databank DBC2-1A in the 2015 science fiction movie Chappie, a movie about a robot police force, directed by Neill Blomkamp (who also made District 9).
The classic calculator and databank watch features auto-LED light, telememo 25 (25 data records for names and telephone numbers), 8-digit calculator, currency converter, second time zone, stopwatch function, 5 multi alarms, snooze feature.
Actor Michael Lerner wears a Seiko SKX009 watch in the movie Brahmin Bulls (2013).
The Seiko watch in the film is a Seiko SKX009 with the typical blue and red bezel, crown at the bottom right of the case, and a black rubber strap. The watch might also be a SKX175 which is almost identical, but the modelnumber for the American market.