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Model reference: 5740/1G-001
Patek Philippe Nautilus 5740/1G-001: a 40 mm white-gold perpetual calendar 8.42 mm high with a blue embossed dial, three registers and a moon phase.
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About this watch
This is the Nautilus perpetual calendar, reference 5740/1G-001, in white gold with a blue dial. The photographs show a 40 mm case with a rounded octagonal bezel, an integrated bracelet, and a dial whose centre is given over to calendar information rather than a single date window. The surface is sunburst blue with horizontal embossing, and the brand lettering sits above the middle of the dial.
The four frames on this page answer four different questions. The straight-on frame settles the dial layout and where each register sits; the angled frame shows how shallow the case is and how the bracelet folds away from it; the case-back frame shows the movement through the crystal; the clasp frame shows the bracelet fastened. What none of them settles is the piece itself — which movement is fitted, what metal the offered watch is made from, which bracelet and clasp come with it, and whether it still keeps water out. Those are questions for the conversation, not claims for a photograph.
Each register carries two readings rather than one. At nine o’clock the days of the week are printed around the outside with the 24-hour numerals inside them; at three the months run around the edge with the four-year cycle numbered inside; at six the dates sit around the rim with the moon phase shown inside the register.
Read together, the dial carries five separate indications without a line of text printed across it. That is why the register positions are worth noticing when you look at the watch: the day and 24-hour pair sits opposite the month and leap-year pair, and the date and moon phase sit below the centre, so the middle of the dial stays balanced instead of being filled with a list.
The inner track of the nine o’clock register runs 6, 12, 18, 24 rather than 1 to 12. It reads a whole day in one sweep, so the dial tells you whether the time shown is morning or evening — something a 12-hour dial alone cannot do.
On a perpetual calendar that distinction has a purpose. A correction should only be made when the mechanism is clear of the change window, and knowing where the watch sits in the 24-hour cycle is how that is judged. Patek Philippe’s published data for this reference notes that the calendar needs a date correction only once a year; how and when to make that correction on the watch in front of you is something to have walked through directly.
The diameter is a mid-size figure; the height is the unusual one. Patek Philippe’s published data for this reference gives 8.42 mm, which is very little for a watch carrying a full perpetual calendar mechanism, and it is why the case reads flat rather than tall in the angled frame. The reference design also specifies a white gold case and bracelet, a screw-down crown, a sapphire crystal case back and water resistance to 30 m.
Whether that suits your wrist depends on measurements a photograph cannot give you. Ask for the lug-to-lug length and the case height measured on the actual watch, and for the number of links fitted, since the bracelet decides where the case finally sits. A watch this thin on an integrated bracelet can wear either larger or smaller than its diameter suggests, and only those figures will tell you which.
The first frame is the dial straight on: the blue embossed surface, the lettering above the centre, the three registers and the moon phase inside the lower one, with the bracelet visible at both sides of the case. The second is the case seen from the side and slightly behind, which is where the shallow profile, the crown and the folded bracelet are easiest to judge.
The third frame looks through the case back. The movement is visible under the crystal with the winding segment sitting off centre above the plates, and the engraving around the outer ring is legible with the bracelet attached at the lugs. The fourth shows the bracelet closed with the clasp folded. Between them the frames cover the dial, the profile, the back and the fastening — the four places most people look at first.
A date-only Nautilus gives you one aperture at three o’clock. This reference gives you the day of the week, the date, the month, the leap-year position and the moon phase, with the 24-hour reading folded into the day register. The dial is busier for it, and the centre of the dial is where the difference is most obvious in a photograph.
The mechanism is the other separation. A perpetual calendar has to allow for unequal month lengths and for February in a leap year, and it is presented here inside a case whose height is barely different from far simpler watches in the same family. If the calendar display is what you are after rather than the plain three-hand look, this is the reference in the collection that carries it.
Four things on this reference cannot be answered from its photographs. Which movement is fitted. What the offered piece is actually made from, case and bracelet together. Which bracelet and clasp variant comes with it. And the water-resistance state of this particular watch rather than of the reference design.
Patek Philippe’s published data for 5740/1G-001 describes the reference, not the individual watch: that is what a specification sheet can ever tell you. So ask for the case back photographed straight on, the clasp photographed open, a clear statement against each of the four points above, and a straight answer on how the watch has been kept — all of it in writing, before any money moves.
Specification
| Detail | Description |
|---|---|
| Model reference | 5740/1G-001 |
| Model size | 40 mm across, 8.42 mm high |
| Dial | Blue sunburst with horizontal embossing |
| Dial print | Brand and city lettering above the centre; the word SWISS at the bottom |
| Hour-marker layout | Applied white-gold baton markers around the dial |
| Hand arrangement | Rounded baton hour and minute hands with white luminescent coating; thin centre seconds |
| Subdial layout | Day and 24-hour at nine; month and leap-year cycle at three; date and moon phase at six |
| Bezel design | Rounded octagonal bezel with polished bevels and a brushed flat face |
| Colour combination | Blue dial against a white-gold case and bracelet |
| Bracelet shown | Integrated white-gold-tone bracelet with polished centre links |
| Clasp | Folding clasp, shown closed in the photographs |
| Case back | Sapphire crystal, with the movement visible through it |
| Movement (reference design) | Self-winding calibre 240 Q, 3.88 mm high, 38 to 48 hours of power reserve |
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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