The Seiko H558-5009 was the first dive watch to feature a digital alarm chronograph with combination analog display.
The 5009 indicates USA distribution, the 5000 elsewhere.
Its nickname came about because it was a favourite watch of Arnold Schwarzenegger and he wore it in several of his 1980s movies, including Commando (1985), Raw Deal (1986), Predator (1987) and The Running Man (1987).
It also appear in James Bond movie A View To A Kill (1985), Roger Moore wears a Seiko H558-5000 with red “DIVERS 150m” stamp on the dial. The watch is on Bond’s wrist in Paris (Eiffel Tower scene) but doesn’t get a lot of screen time compared to other Seiko watches worn in previous Bond films.
In order to build a watch that was rugged enough for the toughest adventures Seiko engineers tested it to -40c and up to +60c. The “Arnie” was a forerunner to the Landmaster series. It was used on adventures to the North and South Poles as well as by an international team of explorers that climbed Everest in 1988.