STP1-11 vs Miyota 9015: Which Movement Comes Out On Top?

STP1-11 vs Miyota 9015: Which Movement Comes Out On Top?

TL;DR: In this comparison between the Swiss STP1-11 and the Japanese Miyota 9015 watch movements, the STP1-11 shines with its superior finishing and accuracy, while the Miyota 9015 impresses with its reliability and performance.


Emerging Alternatives to ETA Movements

As ETA movements become increasingly limited to micro watch brands due to the Swatch Group's decision to restrict supply, manufacturers such as STP, Sellita, and Ronda are stepping in. These companies are providing comparable or even superior quality movements, with Swiss Technology Production's STP1-11 being a prime example.


STP1-11 vs Miyota 9015: The Clash of Movements

Let's explore a head-to-head comparison between the Swiss-made STP1-11 and the Japanese Miyota 9015 to see how they measure up against each other.


Power Reserve

The STP1-11 boasts a power reserve of 44 hours, outlasting the Miyota 9015's 42 hours. This extended power reserve can be attributed to the STP1-11's longer and thinner mainspring, providing an advantage in terms of endurance.



When it comes to accuracy, the STP1-11 stands out with its -3s/day to +7s/day range, resulting in a maximum difference of 10 seconds per day. The Miyota 9015, on the other hand, has an accuracy of -10s/day to +30s/day. While both movements offer satisfactory timekeeping, the STP1-11 takes the lead in this category.



The STP1-11 sports 26 jewels, one more than the Miyota 9015's 24 jewels. This additional jewel supports the top of the barrel arbor, prolonging the movement's longevity. In this aspect, the STP1-11 holds a slight edge over the Miyota 9015.


Quality & Finishing

The STP1-11's quality and finishing are exemplary, with features such as pearlage, a Glucydur balance wheel, and Côte de Genève finishing on the rotor. While the Miyota 9015 may not offer the same level of decoration, its durability and performance have earned it a solid reputation in the watch industry.



In conclusion, the STP1-11 stands out in areas like finishing, jewel count, and accuracy, showcasing the fine Swiss craftsmanship that has become synonymous with high-quality watch movements. While the Miyota 9015 may not offer the same level of decoration, it remains a reliable and high-performing option for those seeking Japanese precision. Though both movements have their unique merits, the STP1-11 has a slight edge, making it an exceptional choice for watch enthusiasts seeking the best of both worlds.

Interested to see more comparisons of pOrtahl's STP1-11? Have look at these articles below.

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