TL;DR: In this blog post, we compare the Swiss made STP1-11 movement by Swiss Technology Production to the Japanese NH35A by Seiko, highlighting the key differences and advantages to help you choose the perfect watch movement. Spoiler alert: the STP1-11 offers some impressive features that give it a competitive edge.
Introducing the STP1-11 and NH35A Movements
The STP1-11 is a Swiss made automatic movement by Swiss Technology Production, often found in high-quality watchews by brands like pOrtahl. The NH35A, on the other hand, is a reliable Japanese movement by Seiko that is widely used in various timepieces across the globe.
Power Reserve: STP1-11 Outshines NH35A
The STP1-11 boasts a power reserve of 44 hours, which is notably longer than the NH35A's 41-hour power reserve. This extended power reserve means your watch can keep ticking for longer periods without the need for winding or movement.
Accuracy: Precision at Its Finest
Both movements offer exceptional accuracy, but the STP1-11 stands out with a daily variation of -3s/day to +7s/day, which translates to an on-wrist performance of +/- 2 to 4 seconds. The NH35A, in comparison, has a daily variation of -20s/day to +40s/day, making the STP1-11 a more accurate choice for watch enthusiasts who value precision.
Jewels: A Subtle Difference with an Impact
The STP1-11 features 26 jewels, while the NH35A has 24 jewels. While this difference may seem minimal, the extra jewels in the STP1-11 support the top of the barrel arbor, enhancing its longevity and reducing wear on the barrel bridge. In this aspect, the STP1-11 takes the lead.
Quality & Finishing: Swiss Excellence Shines Through
Both movements showcase excellent quality and finishing, but the STP1-11 offers a few distinctive features that set it apart. All STP1-11 movements come with pearlage, a Glucydur balance wheel, and Côte de Genève finishing on the rotor, which is absent in the NH35A. These touches of Swiss craftsmanship elevate the STP1-11's overall appearance and quality.
Conclusion: The STP1-11 Takes the Crown
While both the STP1-11 and NH35A are exceptional movements in their own right, the Swiss made STP1-11 ultimately comes out on top with its longer power reserve, superior accuracy, and additional jewels for increased longevity. The exquisite finishing touches and attention to detail make the STP1-11, used in pOrtahl's Peacemaker watch is a clear winner in this showdown.
Interested to see more comparisons of pOrtahl's STP1-11? Have look at these articles below.