Review: STP 1-11

P1010838Since the Swatch Group had decided to bite its nose off to spite its face, e.g. not to supply parts and movements outside the Swatch Group, ETA has been bearing most of the brunt. From the most important movement manufacturer, it will soon be relegated to be a small company making movements for the Swatch Group only.

If I were working at ETA, I would be furious about being almost destroyed. That aside, everyone who has in the past been using ETA movements for their watches now has to look somewhere else. One of the new players in the market are STP, who are based in the Italian speaking part of Switzerland, in Manno.

Carlos from the Prometheus Watch Company in Portugal is looking for an ETA replacement, and wanted me to have a look at the STP 1-11, which is a direct copy of the ETA 2824-2. As the design for the movement isn’t copyrighted any more, everyone can produce a copy. So let’s see …P1010839

The movement on first sight looks great. The finishes are as they should be, the decoration reflects the ETA original, and everything is just so. Let’s look at some microscope shots.0627112716

The balance cock and balance, with parts of the rotor visible. The Cote de Geneve decoration on the rotor is nicely executed.0627112744

A close up of the top balance jewels, properly oiled and clean as it should be.0627112801

Balance cock detail of the regulator, with perlage decoration visible. The “+” sign and the markers are incredibly well executed. If you want some comparison, have a look at an earlier comparison we did of an original ETA with 2 Chinese clones.
.0627113755

The STP logo is very nicely done, and looks a lot better than the stamped logo ETA uses.0627113817

This is a also a nice touch, and I wonder where the 26th jewel is hiding! I will take apart the movement later to hunt it down.

Next, and of course the most important bit, we look at performance.P1010840 P1010841 P1010842 P1010843 P1010844 P1010845

So the movement runs at -3s/day to +7s/day, giving us a total maximum daily variation of 10 seconds. This is very much along the lines of the ETA original, which isn’t COSC certified, either. On the wrist, this will translate to a pretty constant performance of +- 2 to 4 seconds per day or so, exactly what you get out of the ETA. The amplitude is good throughout, as you would expect.

Now where is that extra jewel?P1010849

In the right place! The barrel bridge has a jewel for the upper barrel arbor, and that is spot on. The barrel bridge can easily wear out, and a jewel here will add to the longevity. The lower barrel arbor is of course jewelled as in the ETA.

Conclusion

I prefer the STP 1-11 over the ETA 2824-2 for the following reasons:

  • very nicely finished
  • movement markings better executed than on the ETA
  • jewelled barrel bridge

So what we have here is an improved classic with the performance we are used to, and added longevity. What’s not to like?

35 thoughts on “Review: STP 1-11

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  3. Great review and most helpful. However, one correction -3secs to +7secs per diem is not a total maximum variation of 10 seconds that is impossible it cannot be when the the most you are claiming is -3 or +7 it is however, a 10 second ‘range’. When something is negative it eliminates a positive variable, and vice versa, ergo the offset value is null thus -3 or +7 since it cannot be both at the same time. Definitely a 10 second range minor typo,but still terrific review most helpful as I am looking at an Aevig Corvid Automatik to be realsed with said movement so needed some stats. Greatly appreciated!

    • How do you interpret this:

      From: http://www.cosc.swiss/en/quality/precision
      “One of the criteria for « chronometer » certification is the average daily rate on the first 10 days of testing: from -4 sec to +6 sec., or up to 10 seconds per day. A tolerance which, as such, may appear high, but which, in reality, is the result of an extraordinary requirement.”

      I think “daily variation of 10 seconds” is nothing wrong.

      • The wording of 10 seconds there is no dispute of, you have missed the point. The fact is you cannot have a maximum deviation when one is a negative (-3) and the other is a positive (+7) seconds of 10 seconds you can have a range the maximum in this instance would be either -3 or +7 not 10 that is the bloody point. The range of deviation is the distance between a maximum and a minimum in this case 10 seconds – it is a range that again was the point that is all the rest is most excellent review, except the old style incabloc which only has a 2 point versus the new style which is 3 point otherwise this is a most excellent movement.

  4. Just received my new MAGRETTE with STP 1-11 movement, and I just noticed two things that are akward to me:

    1. when I pull the crown, I “feel” two clicks, one for the “date”, the second for the “hour”, When I push the crown, I feel only one click, while the “date rotor” seems to remain engaged (the date continues to change while rotating the crown to screw it)

    The only way to disengage it is pushing the crown and, keeping it pushed, rotate the crown anticlockwise, then, keeping it pushed, screw the crown clockwise.

    2. second thing, I cannot hand wind the mechanism.

    is it normal?

  5. Hi, just received a new watch with this movement in it two days ago..

    Although running, i gave it 20-30 turns to make sure we’ll powered up. Towards the end it became stiff to turn the crown and started to click.

    Left it off my wrist overnight and after having it on my wrist for a few hours today, wound it again to see if same result. After two or three turns the crown stiffened up again and started to click.

    I know this is a clone of the 2824 of which i have several, however they don’t display this trait, you can keep winding without any noticeable change.

    I’m guessing it’s the clutch mechanism to prevent over winding, but can anyone elaborate on this difference assuming it is normal?

    • It’s the mainspring slipping in the barrel. The movements are almost identical, so a noticeable difference in winding isn’t something that I would expect.

      • Thanks for the quick response Christian.

        I’ve also posted the question on watchuseek as the watch is a new release from Magrette and several others have received at the same time.

        One member has stated he is seeing a similar result when fully wound. Will see what other response come in over the next few days.

        The watch is running well at around -1.5s per day when on the wrist for 24 hours so hoping it’s normal…

        Les

    • I have the same problem with my new Magrette watch. After just about 10-15 turns of winding the crown becomes stiff. On several occasions it has also stopped in the morning despite having been hand wound the day before. Is this normal?

  6. This is very impressive and actually remarkable. ETA and the Swatch Group will in the end finished themselves off. There’s life beyond Swiss.

  7. Thank you for an informative review. A link to it was from the same stable as Prometheus – Borealis. I have now ordered one of their new Cascais watches. The movement looks better and may prove to be better than the ETA.

  8. Loved the tour … thank you

    I keep hearing about parts not being interchangeable … can someone elaborate? …

    Respectfully, Chuck

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  10. I think stp is the Swiss division of Fossil. Asians don’t want Asian made seagull movements in brands like Emporio Armani which Fossil owns so they started up their own production for Swiss made Emporio’s. They only make the stp1-11 right now but maybe more in the future. a spokesmen for the company said it’s similar to the eta 2824-2 but the parts aren’t all interchangeable.

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  12. Christian, thank you for an excellent tour of the STP 1-11. A worthy rival for ETA.2824
    I wonder if ETA will be laying off staff now that they are exclusively Swatch?

  13. Thanks Christian. One question, is all the parts from STP 1-11 fits one to one in a 2824? For Sellita, only some fits and the all the bridges have reverse pegs and holes.

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