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Model reference: M79360B-0002
A 41 mm Black Bay Chrono with a blue sunburst dial, two silver counters and a date at six.
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About this watch
The four frames below are shown as they arrived. They cover the dial straight on with its blue surface and two silver counters, a three-quarter view that brings the bezel markings, crown and both pushers into play, a close-up of the lower dial with the date at six, and a side view along the case flank at the back rim with the bracelet turned away.
Everything the photographs can settle is on this page: the dial colour and its sunburst finish, the pale counters and the scales printed inside them, the applied markers, the printed lines above the date, the tachymetric numerals on the bezel insert, and the shape of the case and bracelet. Where the page gives a figure, it comes from the reference's own published design data and is labelled that way in the table.
What a photograph cannot settle — which movement is fitted, what metal each part is made of, which strap or bracelet comes with the watch, the weight on a scale, and the water-resistance state of the individual watch — is not guessed at here. Those points, plus the bracelet form this reference is supplied in, are put to the seller in the inquiry list at the end of the page.
The first frame is the dial straight on: a blue surface with a sunburst finish carrying two silver counters, one at three o'clock and one at nine, applied round markers set around them, a date window at six showing two digits, and the bracelet leaving the lugs towards the bottom of the image.
The second frame turns the watch three-quarter, which shortens both counters into ellipses and brings the bezel markings, the crown and both pushers into view at the right flank. The third frame moves in on the lower dial, where the lettering, the printed text block and the date sit; the fourth looks along the case flank at the back rim with the bracelet end links turned away. No frame shows anything inside the case, and none of them is a measurement.
The chronograph is read from the centre seconds hand together with the two counters: the left counter is calibrated for a full hour and the right one runs on into hours, so elapsed time comes from the small hands inside the silver discs rather than from the centre hand alone. In the frames the left disc carries 15, 30, 45 and 60 and the right disc carries 15, 30 and 45, and each counter has a short hand with a small counterweight.
The date sits in a window at six o'clock, which is the one dial position that does not collide with either counter on this layout; in the close-up frame it shows two digits in a small rectangular aperture between two outer markers. Because the counters are pale discs against a darker dial, the reading comes from that contrast rather than from the print, and the dial's own print is limited to the wordmark, the shield, two printed lines above the date and the fine track at the rim.
The manufacturer publishes this reference on a bracelet in two forms, a three-link and a five-row, both with the brand's rapid-adjustment clasp, so which one arrives is a supply question for the reference rather than a fixed part of its design. The same published data places this reference in the catalogue on a bracelet of that kind.
The bracelet in these frames is the narrow-row form, with alternating polished and brushed surfaces running back from the lugs and a folded clasp at the end. Since the reference is published both ways, the form supplied with the watch in hand is one of the points on the inquiry list rather than something settled here.
The manufacturer's own product text describes this piece as a boutique edition of the Black Bay Chrono, and the reference data behind that description lists a 41 mm case with polished and satin-brushed surfaces, a fixed bezel with a blue insert carrying a tachymetric scale, a blue dial with silver counters, a date at six o'clock and a domed crystal. All of that is the reference's published design data, not a description of any single watch.
The same published data gives the reference a manufacture self-winding chronograph calibre with a column wheel and the printed line naming its certification, and quotes a water-resistance figure for the reference. Those figures belong to the reference's design specification and are labelled as such in the table below; the frames on this page show the outside of a watch, and the two are kept apart on purpose.
A photograph of the outside of a watch cannot tell you which movement is fitted, what metal each individual part is made of, which strap or bracelet is supplied with the piece, how heavy it is, or what the water-resistance state of that particular watch is. The same is true of the depth figure printed on the dial, which is a dial marking rather than a result for the watch in the frames.
That list is what goes to the seller, together with the bracelet question raised by the reference being published in two forms. Nothing on this page is inferred from a photograph where the photograph cannot show it, and no detail has been added from anywhere other than the frames themselves and the reference's own published data.
The blue-dial Chrono puts its two counters in silver against a blue dial, which is the opposite arrangement to the black-dial version of the same model: here the counters read as pale discs and the dial is the darker element, so legibility comes from that contrast rather than from the print. The blue dial is also a sunburst surface, which is why the colour shifts across the frame as the light moves over it.
In the close-up frame the arrangement is easy to follow: the pale discs and the printed scales inside them stand out against the blue, and the red-printed line above the date is the only red in that part of the dial, echoing the red tip on the centre seconds hand. Buyers who know the black-dial version usually notice the swap straight away, because the counters and the dial have exchanged roles.
Specification
| Detail | Description |
|---|---|
| Model reference | M79360B-0002 |
| Model size | 41 mm, as published for this reference |
| Dial | Blue with silver counters |
| Dial print | Brand wordmark and shield above the centre, a red-printed line and the printed line naming the certification above the date, and a two-digit date at six, as shown in the frames |
| Bezel design | Fixed bezel with a blue insert, per the reference's published design data |
| Bezel graduations | Silver tachymetric numerals with the UNITS PER HOUR lettering at the upper right, as visible in the frames |
| Hour-marker layout | Applied markers set around the dial, with both counters inboard at three and nine and the shield below twelve |
| Hour markers | Applied round markers with pale fills and silver edges, as they appear in the frames |
| Hand arrangement | Two centre hands for the time, a centre seconds hand with a red tip for the chronograph, and a short hand in each counter |
| Date display | Window at six o'clock showing two digits, seen in the close-up frame |
| Subdial layout | Two silver counters: the left calibrated for a full hour, the right running on into hours |
| Colour combination | Blue dial and bezel insert, silver counters, silver hands and markers, with red on one printed dial line and on the seconds-hand tip |
| Strap shown | Narrow-row bracelet with alternating polished and brushed surfaces, as it appears in the frames |
| Strap (reference supply) | Published on a bracelet in three-link or five-row form, both with the brand's rapid-adjustment clasp |
| Movement (reference design) | Manufacture self-winding chronograph calibre MT5813 with a column wheel, per the reference's published data |
| Crystal (reference design) | Domed crystal, per the reference's published data |
| Case finish (reference design) | Polished and satin-brushed surfaces, as published for the reference |
| Water resistance (reference design) | A figure quoted for the reference in the manufacturer's catalogue data; not a reading taken from the frames |
Questions
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Six frames that answer more than a long description: daylight dial, bezel straight on, bracelet closed, clasp, case back and a short video of the moving parts.
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