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 £ 11,500.00
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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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Order processing

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 order, please email us. We'll try our best to prioritise your order.

Shipping guide for watches

UK: FREE DPD shipping, 1-2 working days / FREE Royal Mail Tracked 24, 1-2 working days

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

The EU: FREE DHL shipping, 2-4 working days. To order to The EU, please visit our Euro website here (duties and taxes are included in the price of your watch).

Click here to see the full shipping guide for watches

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 an express service. You can see an estimated timescale when you input your address at the checkout.

Shipping guide for watch straps

If purchased separately from your watch, watch straps will be shipped with Royal Mail 1st Class / International tracked shipping, or you have the option to pay a additional fee for an express service.

This takes 2-14 working days depending on location. You can see a more accurate timescale when you input your address at the checkout.

These delivery times are a guide based on the carriers terms of service, products may, in some unusual cases take longer to arrive. If this happens, please get in touch.

Return your watch for an exchange

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.

Return your watch 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.

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.

To return other products (such as straps) please email us: info@mrjoneswatches.com to arrange this.

UK returns

1) Generate your free returns label here.

2) Print it off and stick it to your original packaging.

3) Take it to your local post office. Find your closest here.

(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).

NB please include a short note describing the issue with the watch and your contact details.

EU and International returns

Please send the watch to this address:

Mr Jones Watches (repairs)
61 Dartmouth Road
London SE23 3HN
United Kingdom

Ensure the watch is securely wrapped in bubble wrap to protect it in transit.

Please include a note stating:

- the reason for the return
- a detailed description of the problem with your watch (if sending for repair)
- your email address and your order number
- remember to include your return delivery address, (so we know where to send the repaired watch)

We recommend you use a tracked service. 

As the UK is no longer in the EU, you will have to fill in a Customs Declaration form.

Please write in the description field "wristwatch, return for factory repair / refund , no commercial value" and list the item value as £10.

This is essential otherwise an import duty will be levied which you will be liable for (there is no way for us to reclaim this charge).

Please note: we do not cover shipping costs for unwanted items, returned from outside of the UK. If you are returning a watch that is faulty we may be able to reimburse shipping costs if your watch is within warranty, please contact us ahead of sending in this instance.

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