Series
The Planet Ocean is the Seamaster line built for depth, and the reference in this collection is its chronograph form: a 45.5 mm case in steel with warm-toned gold on the bezel rim, the crown, the pushers and the bracelet’s centre links, a blue ceramic dial, and a ceramic bezel carrying a diving scale. Two counters sit either side of the centre, the date is pressed down into an aperture at six o’clock, and the printing beneath the hands carries the certification and the depth rating. The frames on the watch page show the dial straight on, the watch at three-quarters with the crown and pushers in view, the lower dial close up, and the back with the movement behind it.
In this collection
45.5 mm Planet Ocean chronograph with a blue ceramic dial, two counters above a date aperture at six o'clock and a blue bezel insert carrying a gold-toned dive scale.
This collection lists a small number of configurations. Series not shown here can still be discussed — send the model and reference and availability is checked for you.
Design notes
A chronograph dial with two counters has already spent the space either side of the centre on the running seconds and the elapsed-minute register. Putting the date at three as well would push three apertures into the same half of the dial, so on this reference the window sits at six o’clock instead, below the centre line and clear of both counters. The result is a dial that reads evenly from left to right, and a date that is easy to miss until you look for it — which is a design decision worth noticing before you decide it is a fault.
At 45.5 mm across and 18.87 mm from the back of the case to the top of the glass, this is a watch whose height is as significant as its width: it changes how the case sits on the wrist, how a cuff passes over it and how a strap or bracelet has to be adjusted. The published figures also give 52.30 mm from lug to lug and about 267 g on the bracelet. Those four numbers together describe the fit far better than the diameter alone, and the ones that matter most on a watch being offered are the measured figures for that specific piece.
These notes describe the design as it appears in the photographs on this site. Movement, water resistance, weight and material composition are not stated here, because those belong to the specific unit being offered and are confirmed in the conversation before anything is paid.
Compare