Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)
Patek ref 3418 (Convertible)

Patek ref 3418 (Convertible)

Patek ref 3418 (Convertible)

Regular price $15,500.00
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Sometimes, the rarest watches aren’t the flashiest ones — the ones that whisper, rather than shout.

This is not your usual Patek, the ref. 3418 was an understated experiment: a steel, convertible watch built for engineers and scientists and released in 1958. While the rest of the world was making ever-flashier gold dress watches, Patek quietly released this clever piece with a “convertible” case that could switch between a strap and a bracelet. This watch has the original lug configuration fitted, the steel bracelets come on the market occasionally, however to my mind this watch belongs on a leather strap, rather than a Milanese bracelet, consequently I never sought to acquire a bracelet for it. 

Under the dial beats the Patek cal 12-400. This watch is part of the earlier generation of ref 3418 and features the non-antimagnetic variation of the movement. D

Today, the Ref. 3418 sits in that sweet spot of watch collecting: genuinely rare, historically interesting, and beautifully wearable. It’s a watch you could wear daily without anyone realising quite how special it is — except the few who really know.

* Year: Circa 1958–1962
* Case: Stainless steel, 34 mm, four-piece convertible design
* Dial: Original silvered finish with sub-seconds
* Movement: Manual wind, calibre 12-400 
* Crystal: Acrylic
* Condition: Excellent vintage condition with light, even patina. Dial shows gentle ageing. Case unpolished with crisp edges. Convertible mechanism fully functional.

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We aim to dispatch all orders within 1-2 working days.

When your order is dispatched, your tracking details will be updated.

If you have opted for a custom engraving please allow an additional 1-2 working days.

If you are purchasing during a sale or a limited edition release - you can expect an email update with an estimated dispatch date if there any changes to the timeframe.

If you are in a hurry for your watch, please email us.

Shipping guide for watches:

United States and Canada: FREE DHL Express shipping, 1-3 working days / FREE UPS shipping, 1-3 working days

Mexico: $13, DHL Express, 2-3 working days

Shipping guide for t-shirts

Our t-shirts are printed by us, made-to-order and shipped from our workshop in London. This means that occasionally, if your order includes a t-shirt there may be a 2-3 day delay in dispatch.

If you place an order for both a watch and t-shirt(s), they will be shipped together via an express service. Delivery times for these can be found here.

If you order a t-shirt without a watch, it will be shipped via a Royal Mail tracked service which usually takes a little longer, or you have the option to pay an additional fee for a courier service (Either DHL or UPS). You can see an estimated timescale when you input your address at the checkout.

Shipping guide for bands (unless purchased with a watch):

- FREE Royal Mail tracked, 5-10 working days

- $13 DHL Express, 1-3 working days

- $13 UPS, 1-3 working days

During busy sale periods dispatch may take a little longer (this is quite rare). These delivery times are a guide based on the DHL, UPS and Royal Mail terms of service, products may, in some unusual cases take longer to arrive. If this happens, please get in touch. 

We are happy to exchange unworn watches.

Fastening the watch will cause damage to the leather. If this is the case, we charge for the watch strap (or we can put the worn strap on the exchanged watch for free).

Please email us directly if you think your watch is faulty: info@mrjoneswatches.com

Return for a refund

To return for a full refund, you have 30 days if purchased online.

If you purchased your watch in-store, we can offer an exchange or store credit only. This is because you’ve seen the watch in person and had the opportunity to try it on. Please let us know if you’re purchasing as a gift.

We do not cover shipping costs for unwanted items from outside the UK.

Returning your watch to us

To request a return for an unwanted watch, please follow the instructions below. Our team will process the request and issue your label or contact you directly within 1 working day.

1) Request your return label here.

2) Once issued, print if off and stick it to your original packaging.

3) Take it to your nearest DHL drop off point.

If you no longer have your original packaging, please ensure your watch is securely wrapped in bubble wrap / something similar to protect it in transit.


Please note: if you are returning a watch that is faulty we can cover shipping costs if your watch is within warranty, please contact us ahead of sending in this instance.

T-shirt returns and exchanges

We recommend checking the measurements of our t-shirts on our size guide before placing your order, you can also check them here

However, if your t-shirt is faulty, we can offer an exchange or a refund. In this circumstance, please email us within 30 days of placing your order, with a photograph of the problem, as well as your order number.

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