Case and Dial Construction
The Seamaster Planet Ocean 600M 'Big Blue' utilizes a 45.5mm case crafted entirely from blue ceramic, identifiable by its 'twisted lug' configuration. The case assembly includes a sapphire crystal protecting the dial and a signed crown. A unidirectional rotating bezel is integrated into the case structure, featuring a Liquidmetal diving scale and orange rubber inserts.
The dial is also manufactured from blue ceramic, denoted by the [ZrO2] hallmark. It displays 18K white gold and orange-toned hour markers alongside a date window at the 3 o'clock position. The chapter ring features a 24-hour scale printed in orange, which functions in conjunction with the luminous broad arrow handset and the dedicated orange GMT hand for tracking secondary time zones.
Evidence for this section
- “45.5mm blue ceramic 'twisted lug' case”
- “unidirectional bezel with a Liquidmetal diving scale in blue and orange rubber accents”
- “blue ceramic dial with 18K white gold and orange-toned indices”
- “luminous 'broad arrow' handset with an orange GMT hand”
