In August of 2022, Citizen launched the NB6021 series of dive watches under the Promaster line. This series is a revival of a 4 decade old mechanical dive watch design by the brand. The Citizen 62-6198 Challenge Diver series which was made from the late 1960s up until the early 1980s was the inspiration. Although there were many sub-variants, the vast majority of the models look perilously similar. It was ruggedly built with typical concepts and lines of contemporary dive watches of that period. What makes it noteworthy was a discovery of one of the watches that washed up on Long Reef Beach in Australia in 1983 coated with barnacles. Despite being lost at sea for a long time (that particular example was made in 1977), it was still working diligently when found. This fact sealed the legendary reliability of the design.
In the middle of 2021, Citizen launched a more basic revival of the Citizen 62-6198 Challenge Diver in the form of the NY0125 series. With stainless steel and mineral glass as core materials for the series, it was powered by the basic Miyota 8204 movement. I was immediately intrigued by this model. What caught my interest was the completeness of the design - a dive watch that is not as large as contemporary models found in the market right now.
