facebook pixel
  • Watch Certification Services of America100% Certified Authentic


    The Trusted Name in Authenticated Luxury Timepieces

    Every watch on our site is 100% certified authentic. Certificates are issued by WatchCSA, the industry's leading independent authority on watch authentication.




In-House Vs. Outsourced Movements. Does it Matter?

February 24, 2019

BY Andy Callan


If you have always enjoyed debates, disputes, and full-on raging arguments, watch collecting is definitely the hobby for you. Horology gives fans endless opportunities to squabble on a wide array of topics, from movements to dial text. Advocates will champion one brand against another – sometimes to fanatical degree, or will weigh in on the whole vintage vs. modern debacle so passionately that you start to fear for their blood pressure.

One of the all-time classic bones of contention remains the respective merits of luxury watches that use calibers designed and built by the manufacturer themselves (commonly described as ‘in-house’ movements) against those which are powered by calibers brought in from a third party, or ‘outsourced’ movements. As with any discussion, there are merits and minuses on both sides, so below we will take a look at things in a bit more detail and try and work out what’s what.


Every single watch in Rolex’s current collection is fitted with a movement that is manufactured entirely in-house.

What Exactly are In-House Movements?

Possibly the biggest cause of disagreement on the issue is defining what exactly constitutes an ‘in-house’ movement. Any mechanical caliber is made up of a huge number of components. Even the simplest, most basic designs won’t operate without somewhere in the region of 100 different parts, and the hyper-complicated end can sometimes contain up to a thousand. It is extremely rare for one manufacturer to make every single one of those constituents themselves, more often than not buying at least some in from one or several other suppliers.  

So, at what point does a caliber officially become in-house? Is it when 50% of it is produced in the manufacturer’s facility? 75%? 91%? No one seems to be able to put a definite figure to it.

Additionally, there is the whole issue of semantics. The vast majority of outsourced movements, particularly where Swiss watches are concerned, are made by ETA, who hold a virtual monopoly. ETA is a wholly owned subsidiary of the Swatch Group, which also owns brands like Omega, Hamilton, Tissot, and others. So does that mean those manufacturers under the Swatch umbrella that use ETA’s movements can say they are in-house as well?

It is all a bit murky and mysterious, but there is no doubt the term itself carries a certain amount of cachet among collectors, and brings with it subtle  implications of superior craftsmanship, heritage, and prestige.


First introduced in 1988, the Caliber 3135 is probably the most prevalent in-house Rolex movement in existence.

Does In-House Perform Better Than Outsourced?

Again, there is no easy answer. A sweeping statement claiming every in-house movement is more accurate, more reliable, and more robust than every outsourced movement is just plain wrong. ETA has been around in one form or another since 1793. The business as we know it today was formed by Eterna in 1856. That is a very long time for a company to be doing more or less just the one thing – making calibers. If you or I had dedicated the last 200 years or so to a single occupation, we could be reasonably assured that we would be fairly expert at it by now.

ETA produces some superb movements that are used in a number of outstanding watches. Their ETA 7750, for example, otherwise known as the Valjoux 7750, is used in the majority of chronographs currently available. It, like many of their calibers, is offered in a number of different grades, with the highest, Chronometer Grade, meeting the COSC’s strict requirements of -4/+6 seconds a day, adjusted to five positions.

So, there is nothing to guarantee that an in-house caliber is going to perform better simply because it was built in the same factory as the rest of the watch. It is more a case of having to compare one specific in-house movement to a specific, and comparable, outsourced one.


All of the manually-wound movements inside the ultra-collectable vintage Rolex Daytona watches are modified versions of the Valjoux 72, rather than something made entirely in-house by Rolex.

The In-House Label: Worth its Weight

As we said before, there is a definite status symbol element to being able to say your watch has an in-house engine. Due to the enormous expense involved in conceptualizing, researching, fabricating, and testing a movement, it is something beyond the scope of the vast majority of manufacturers. That immediately gives it that most luxurious of benefits: exclusivity. And anything exclusive, as we all know, has to be paid for.

You could say that any high end model advertised with an in-house caliber almost sells itself. Rolex, as one example, were not shy in letting us all know when the Daytona finally received its first manufacture caliber, instantly taking demand from extremely high to positively stratospheric. Every brand recognizes the value of the in-house label, which explains Swatch Group’s gobbling up of ETA. Japanese corporation, Citizen recently bought out movement maker and fellow countrymen, Miyota for the same reason.

Since the end of the quartz crisis, luxury watches are far more often an emotive purchase than a utilitarian one, and manufacturers have been doing everything they can to appeal to buyer’s passions ever since – rather than to any real practical considerations.

A homegrown movement is just one of those things that sets the true enthusiasts’ hearts racing. A caliber built by the same brand as has the name on the dial, especially one made exclusively for a particular model, has a story – far more than one beating away inside a host of other cases from a number of different competing brands.


Breitling has historically been one of ETA’s biggest customers; however they have been forced to start manufacturing their own movements.

The Pros and Cons

Obviously there are other benefits for a brand to make its own mechanisms beyond merely the image of it. Exercising complete quality control over the entire process can only be a positive. Construction techniques can be standardized and precise materials used at every step. Additionally, for those who like to show off the beauty of their handiwork through a sapphire case back, the movement can be finished however they like.

That being said, ETA also supplies ébauches, the basic building blocks of a movement which can be assembled, modified, and decorated to each company’s specific requirements. On the other hand, having an ETA caliber serviced is usually a whole lot cheaper than a manufacture movement. Finding a freelancer to repair an ETA isn’t difficult while, technically, only a watchmaker who works for (or has been authorized by) the specific brand has the skills and equipment to tackle a proprietary movement.

Perhaps the biggest advantage for modern watchmakers to create their own movements is going to be one of supply. When Swatch Group took over ETA, they announced their intention of stopping the sale of movements to third-party competitors, those names not under their direct control. An interjection by Switzerland’s monopoly commission prevented them from cutting their obligations immediately, but that bit of legal reprieve runs out at the end of this year.

While other companies have stepped up to fill in the gaps, firms such as Sellita, Soprod, and STP, more and more watch brands are either building movements for themselves or else working in collaboration with others in the industry to share the considerable expenditure. The highest profile example of the latter has been Tudor’s recent partnership with Breitling. 

Formerly two of ETA’s biggest customers, Swatch’s decision has necessitated a cooperation, leading to Tudor being given Breitling’s B01 to use in their Heritage Chronograph range (rechristened the MT5813), while Breitling receives the three-hand MT5612, going the other way, for its Superocean Heritage II; once modified, it is now the B20. It is an incredible achievement for Tudor especially. Until a few years ago, Rolex’s sister company bought in every caliber it used. Now, not only do they build most of their own, they are actually in a position to supply others.

The in-house vs. outsourced movement debate is a perennial favorite and one with several different factors to take into account. Saying one is inherently better than the other simply doesn’t stand up; like anything, it all depends who’s making them. While the argument isn’t going to go away, it is certainly going to change in the next few years as evermore watchmaking names have their hands forced by the drying up of the ETA supply, compelling a sharp increase in the number of domestic movements being built. As always, we will keep you up to date with all the latest developments.


The in-house Caliber 3136 movement inside a Rolex Datejust.



Leave a Reply

  • This error message is only visible to WordPress admins

    Error: API requests are being delayed. New posts will not be retrieved.

    There may be an issue with the Instagram access token that you are using. Your server might also be unable to connect to Instagram at this time.

    Error: API requests are being delayed for this account. New posts will not be retrieved.

    There may be an issue with the Instagram access token that you are using. Your server might also be unable to connect to Instagram at this time.

  • Get The Best Deals - Buy A Rolex
    Sell A Rolex

    "The most trusted place to buy or sell a used luxury timepiece" – WSJ

    • AWCI
    • Jewelers Board of Trade
    • IWJG
    • TrustLock
    • Spirit of Enterprise
    • PayPal Verified
    • Inc 500
    • FedEx
    • UPS
    • The Hartford

    Bob's Watches is an independent watch dealer and is not sponsored by, associated with and/or affiliated with Rolex S.A., Rolex USA, or any other brand listed on its website. Bob's Watches only sells pre-owned watches and provides its own warranties on the watches it sells. The brand names and associated model names for Rolex, OMEGA and other manufacturers are the trademarks of their respective owners.