1 / 4 Replica collection · Planet Ocean · Dive chronograph with date
Model reference: 215.20.46.51.03.001
Omega Seamaster Planet Ocean 600M chronograph 215.20.46.51.03.001, a 45.5 mm two-tone dive chronograph with a blue ceramic dial, the date pressed down to six and a gold-toned diving scale on the bezel.
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About this watch
Reference 215.20.46.51.03.001 is the Seamaster Planet Ocean 600M chronograph in 45.5 mm, published by Omega as a steel and 18-carat Sedna gold dive watch with a blue ceramic dial and a blue ceramic bezel insert carrying a gold-toned diving scale. The same published data gives 18.87 mm of thickness, 52.30 mm from lug to lug, 22 mm between the lugs, a weight of about 267 g on the bracelet, 60 bar of depth rating with a helium escape valve, an alveol screw-in case back and a Master Chronometer calibre 9900 with 60 hours of power reserve behind a transparent back.
The four frames below are shown as they arrived. They settle the colour and the print of the dial, where the date sits, what the two counters carry around them, how the bezel scale reads, which parts of the case and bracelet read gold-toned against the steel, and what is visible through the case back.
They cannot settle which movement is fitted to the watch you would be offered, what each part is actually made of, which bracelet and clasp would come with it, how much it weighs as put on a scale, or the state of its water resistance. Those belong in the message rather than in the copy.
The case measures 45.5 mm across, and the published data for the reference puts it at 18.87 mm thick and 52.30 mm from lug to lug, with 22 mm between the lugs and roughly 267 g on the bracelet. Diameter is the headline figure, but on a watch this tall the two numbers you actually feel are the lug-to-lug span and the thickness, because they decide whether the case sits flat on the wrist or stands proud of it.
The height comes from the chronograph works, the depth-rated case and the movement, so there is nothing padded about it. Measure your wrist flat and compare that against 52.30 mm rather than against 45.5 mm, and if you are close to the limit ask for the offered watch to be photographed on a wrist with a ruler in the same frame. The published figures describe the design; the individual piece should still be measured for you.
The date sits at six o'clock in a small square aperture low on the dial, and the two counters stand either side of it above the centre. The left counter carries the numerals 15, 30 and 45 around a slim hand; the right counter carries 3, 6, 9 and 12 around a short recorder hand. The published description of the reference lists a small seconds sub-dial alongside the 60-minute and 12-hour chronograph recorders, which is why the printed scales inside the counters are the part of this dial worth reading closely.
Pressing the date down to six is what frees the space at nine and three for the recorders: on a chronograph with two counters and printed scales, a window at three would have had to sit in the middle of one of them. Ask for the counters to be photographed once with the chronograph stopped and again with it running, so you can see where each hand rests at zero and whether it returns to the same place when it is reset.
The published configuration for 215.20.46.51.03.001 is a 45.5 mm case in steel with 18-carat Sedna gold, so the case body and the outer links of the bracelet are steel while the gold is carried by the bezel rim, the crown, the pushers and the centre links of the bracelet. In other words the gold sits on the parts the hand touches and on the rim around the dial, rather than on the body of the watch.
That is how the frames read when the watch is turned. Straight on, the case flank and the outer links come out pale while a band of gold runs down the middle of the bracelet; in the three-quarter view the same tone shows on the bezel edge, the crown and both pushers. What no photograph can settle is the composition of the metal on the piece being offered, or how much gold sits in each element, so ask for the materials to be confirmed part by part for the specific watch.
The bezel is a unidirectional rotating dive scale with a blue ceramic insert, and the gold-toned scale within it is named as Ceragold in the published data. The numerals 20, 30, 40 and 50 are the ones legible in the frames, set on a scale built from numerals and fine divisions, with a single luminous pip at the top of the insert to line the scale up with the minutes hand.
A dive scale is set once at the start of a dive and then has to hold its position, so the action of the bezel matters as much as the print on it: how it clicks round, how much play there is before it moves, and where it stops. A still frame shows none of that, and it also says nothing about how the joint between insert and case is sealing on this particular watch. Ask for the bezel to be turned a full circle on video and for the pip to be shown lined up with the marker at the crown.
Below the centre the dial carries three printed lines in white: the first names the escapement as CO-AXIAL, the second names the MASTER CHRONOMETER standard, and the third gives the depth rating as 600m / 2000ft. Above the centre the dial carries the brand and Seamaster Professional, and the numeral 12 stands alone at the top with markers at every other hour.
The depth figure in that print belongs to the reference: 60 bar, or 600 m, with a helium escape valve, according to the published data for this configuration. It describes what the design is built to withstand and not what has been done to the watch in front of you. If the piece is going to be worn in water, the condition of the seals and the history of the case back are questions to put to the seller rather than lines to read off the dial.
The last frame turns the watch over. The back is transparent, so the movement is visible through the glazing with the winding weight lying across the centre and a gold-toned element set into that weight, and the ring around the glazing carries engraved lettering that includes the 600m / 2000ft marking. The published data describes an alveol screw-in case back, and the scalloped notch pattern along the edge in that frame is the feature the term refers to.
A display back shows shapes rather than state. You can see that a winding weight sits over the movement, but not which calibre is fitted to the watch you would receive, how it is running, or when the case was last opened. Ask for the movement to be shown running with the chronograph started, and for the case back to be photographed square on so the engraving around the rim can be read from edge to edge.
Specification
| Detail | Description |
|---|---|
| Model reference | 215.20.46.51.03.001 |
| Model size | 45.5 mm |
| Dial | Blue ceramic, reading with a fan of lighter blue where the light crosses it |
| Dial print | Brand and Seamaster Professional above the centre; CO-AXIAL, MASTER CHRONOMETER and 600m / 2000ft printed below it |
| Hour-marker layout | One marker at each hour, trapezoid in shape with two flanking the date at six, and the numeral 12 standing alone at the top |
| Hour markers | Applied markers with gold-toned frames around pale filled centres |
| Hand arrangement | Broad hour and minute hands with arrow tips and pale fill, a slim centre seconds hand, and a short hand in each counter |
| Date display | Square aperture at six o'clock showing two digits, below the CO-AXIAL print |
| Subdial layout | Two counters either side of the centre: the left printed 15, 30 and 45, the right printed 3, 6, 9 and 12; the published description lists a small seconds sub-dial with the 60-minute and 12-hour recorders |
| Bezel design | Unidirectional rotating dive bezel with a blue ceramic insert, the gold-toned scale named as Ceragold in the published data |
| Bezel graduations | Gold-toned numerals with fine divisions between them and a luminous pip at the top of the insert; 20, 30, 40 and 50 are legible in the frames |
| Colour combination | Blue dial, dark blue bezel insert with a gold-toned scale, steel-toned case with gold-toned rim, crown and pushers |
| Bracelet shown | Three-part bracelet with gold-toned centre links and pale outer links, running from the lugs in the frames |
| Bracelet (reference supply) | Steel and Sedna gold bracelet per the published configuration for this reference |
| Clasp (reference supply) | Extendable foldover clasp per the published configuration; not visible in the frames |
| Crown and pushers | Gold-toned crown between two gold-toned pushers on the right flank, each with a dark blue band, shown in the case back frame |
| Case thickness | 18.87 mm per the published data for this reference |
| Lug to lug | 52.30 mm per the published data for this reference |
| Lug width | 22 mm between the lugs per the published data for this reference |
| Weight (reference data) | About 267 g on the bracelet per the published data for this reference |
| Water resistance (reference data) | 60 bar, or 600 m, with a helium escape valve per the published data for this reference |
| Movement (reference design) | Master Chronometer calibre 9900, self-winding, 60-hour power reserve, Co-Axial escapement, column wheel and a time-zone function |
| Case back | Transparent back over the movement with engraved 600m / 2000ft lettering around the rim, and the scalloped alveol notch pattern along the edge in the frames |
Questions
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