Tradie Kids Classic Digital Watch - Patrick Gibson - The Portable Door
This is an interesting watch choice, as Tradie is an underwear brand not usually associated with watches.
The Tradie Kids Classic Digital Watch has all the goodies of a proper cheap digital watch including day, date, alarm, light and stopwatch. Texts on the case include "MADE TRADIE TOUGH" and "water 50M resist". The watch has a negative screen (light digits on a dark screen).
This watch was probably selected for the film because Tradie is an Australian brand and the movie is an Australian production.
The Tradie watch is only available in Australia on the Tradie website (AUD29).
The most similar Casio watch is the Casio LA-20WH-1B (see on Amazon, $20), which also has a negative screen with similar layout, four buttons, blue line around the dial, black case and strap. Note that the LA-20WH-1B is a fairly small watch so suitable for smaller wrists.
Other similar Casio watches are:
Find a great selection of affordable classic digital watches on Amazon.