The STP1-11 Swiss Automatic
Updated: May 16
If you're like us, one of the first things you want to know about a new independent brand is, "what movement do they use?". This is an important question because the movement has a lot to do with the quality and reliability as well as the value you perceive the watch to have.
For the Stella Felix, we chose the Swiss automatic STP1-11.
Now, the question that always follows is, "How does the STP1-11 compare to it's well known and respected cousins, the ETA 2824-2 or the Sellita SW200?". So, allow me to break it down.
It's easy to say the STP1-11 is an ETA 2824-2 clone that was developed by Swiss Technology Productions as an alternative to Sellita. Both STP and Sellita create movements to fill the void in the market when ETA stopped supplying to third parties. But in a side-by-side comparison, the STP1-11 is more than just the younger kin to the 2824. It follows in the footsteps of its respected elder but added a few tricks of its own. For one, it uses a longer and thinner mainspring which boosts the power reserve to 44 hours (38 on the ETA). It also adds an extra jewel on the upper barrel arbor, a spot which can easily wear, and so adds to its longevity. When looking at performance, both movements when regulated will run at +/- 2 to 5 seconds per day. Although not COSC certified, every STP1-11 is tested to the same criteria as COSC, adjusted in 5 positions, which ensures the watch will run at the same rate in various positions on your wrist. The ETA 2824-2 has four grades but only the top two are tested to the same 5 positions.
These specs were very important to us when developing a quality product we could be proud of. And then we considered the design. The truth is, the STP1-11 is a beautiful movement and it's why we chose to use a sapphire caseback. We also upgraded with the addition of heated blue screws (I mean, they match my eyes 😁 ) and a custom rotor in black sunburst finish with a red enamel star. We think the result is pretty cool.
If you would like to read more about Swiss Technology Productions, there is an informative article from ABlogToWatch which gives you a glimpse into their immaculate and modern facilities, and an in-depth look at the movement from The Watch Guy.
And of course, if we can answer any questions, just send us a note.
STP1-11 Automatic Movement
28,800 Vibrations Per Hour
44 Hour Power reserve
Incabloc Shock Absorber
Gilt Balance Wheel
Heated Blue Screws
Custom Stella Rotor