The Reference

Examined to the movement.

The Nautilus ref. 5726A is a stainless steel annual calendar produced within Patek Philippe's Nautilus line, distinguished by its combination of moonphase display, day, month, date, and an additional 24-hour hand set against a fixed subdial. This 2020 example measures 40.5mm in its signature horizontally embossed dial, framed by the porthole-inspired case and integrated bracelet design that has defined the Nautilus since its introduction. The dial layout places day and month apertures beneath the Patek Philippe Geneve signature, with a moonphase and 24-hour indication subdial positioned above a date window at six o'clock. Power comes from the automatic caliber 324 S QA LU 24H/303, offering 45 hours of power reserve. Presented as a full set with additional accessories, this example includes original papers dated 2020, a serialized hang tag, and a stylus. Unworn with Patek Philippe box and papers dated 2020.

Reference Guide Read the full Nautilus reference guide

Reference details

Specifications

Brand: Patek Philippe
Reference: 5726A
Year: 2020
Movement: Automatic
Case size: 40.5mm
Case material: Stainless Steel
Dial: Black
Condition: Unworn
Contents: Full Set

Delivery

Shipping

Every Palazzo watch ships fully insured and tracked — packed by hand in our Jersey City showroom and released only on your signature.

Insured & tracked

Fully insured worldwide, with a signature required on delivery.

Discreet, secure packing

Packed by hand in unbranded, tamper-evident packaging.

Collect in Jersey City

Or have it delivered, fully insured, to your door.

Sell or trade

Trading

Have a watch to put toward this one? Trade in any fine timepiece and we’ll apply its value directly to your purchase.

Free insured label

We send a prepaid, insured label to ship your trade safely.

Examined & documented

Authenticated by our watchmakers and photographed as a full set.

Fast payment

Bank transfer or check issued as soon as it arrives.

Visit the Sell & Trade page ›

In our clients’ words

Reviews

Read all reviews ›

4.845 verified reviews

I can't tell you how happy I am with Michael and the team at Palazzo Watches. I've been looking for a specific, very rare AP for a long time. Michael found one and worked with me every step of the way to get it into my hands. He was incredibly professional and accommodated every request and need I had. 10/10, will definitely be back for more.

The Watch MisterAug 5, 2026via Google

Fantastic experience from start to finish! Offer honest opinions and recommendations because they truly want you to find the right watch, not just make a sale. The office has an amazing view! Highly recommend for anyone looking for a watch and a first-class experience.

John QuickAug 2, 2026via Google

I found my go to place to purchase luxury watches!! Mak and Michael were very professional, transparent, helpful, genuine and kind to me. They made the process of buying my first Rolex very easy. All their watches are authenticated with paperwork and box provided. Mak and Michael were very knowledgeable about each watch and answered all my questions to the fullest extent. I would 100% recommend anybody who is looking for their first or next piece in their collection to come here and purchase a watch.

Moiz SyedAug 1, 2026via Google

From the collection

See our new arrivals first

The best pieces sell before they’re listed. Get first look in your inbox.