
The Serica Ref. 5303 Diving Chronometer (ref. 5303-1-diving-chronometer) is an automatic dive watch, with a 39mm stainless steel case, 12.2mm thick, powered by the M100 COSC movement and a 42-hour power reserve. Water resistance is rated to 300m, under a sapphire crystal, with cosc complications. Manufacturer MSRP is $1,768. The dial color is enamel black.