Patek Philippe · Golden Ellipse

Strap for Golden Ellipse 5738 Zebra

Integrated bracelet: measurements, the most common questions, and the way to a made-to-measure strap.

Integrated bracelet

The Patek Philippe Golden Ellipse 5738/50G-023 is designed with a bracelet integrated into the case. For a compatible made-to-measure strap, the Casati Milano atelier builds it on your watch.

Case diameter35 mm
Reference5738/50G-023
FamilyGolden Ellipse
MovementPatek Philippe caliber 240 hours, minutes
Year2022
CaseWhite Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Golden Ellipse 5738/50G-023, seen from the bench

The Golden Ellipse 5738 Zebra is a Patek Philippe model designed in 1968 according to the golden ratio. The watch features an elliptical case shape in white gold with an integrated bracelet. The bespoke strap service by Atelier Casati Milano offers custom leather solutions in alligator or aged Barenia to match the geometric complexity of this timepiece.

Frequently asked questions

Can a standard strap be fitted to the Patek Philippe Golden Ellipse 5738/50G-023?

No. The bracelet is integrated into the case: there are no standard lugs to attach a strap to. The connection is part of the watch's geometry itself. The only option is to build a strap from scratch, directly on the case.

How does the bespoke strap service work for this model?

I work on this watch exclusively through <a href="/pages/casati-booking">Casati Milano</a>, by appointment, at Via XX Settembre 15 in Milan. I take measurements directly from the case at the bench, curve by curve. I don't work from photographs or data sheets — every attachment is shaped by hand on the original watch.

Which leather do I recommend for the Golden Ellipse?

Alligator, always. The Golden Ellipse is a watch of intellectual understatement — it doesn't demand attention, it earns it. Alligator has the same logic: a natural, dense texture that ages with character without ever being loud. On white gold, I prefer midnight blue or slate grey alligator — it speaks to the restraint of the case without dulling it.

How long does a well-made strap last?

With normal care, a quality alligator strap lasts five to eight years. The key is to let it breathe: don't wear it two days running, keep it away from water and direct heat. Leather doesn't deteriorate — it transforms. Over time it develops a patina that tells the story of use, and that is one of the finest things I have seen at the bench.

Why is the elliptical shape of the Golden Ellipse so difficult to replicate in a strap?

The Golden Ellipse is designed according to the golden ratio: the curves are not symmetrical in the classical sense — they follow a precise mathematical proportion. This means every attachment must adapt to a geometry that shifts progressively along the case profile. You cannot cut a standard strap and hope it integrates. It must be shaped point by point, by hand.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only