Inside the Mechanisms: Miyota 8215 vs. NH35 Automatic Watch Movements

When it comes to automatic watch movements, two names that often come up in discussions among watch enthusiasts are the Miyota 8215 and the NH35. These movements are popular choices for many watch brands due to their reliability and affordability. In this article, we’ll take a closer look at these two automatic watch movements, exploring their key features, differences, and what sets them apart in the world of horology.

The Miyota 8215 Movement

Background and History

The Miyota 8215 is produced by Citizen Watch Co., Ltd., a Japanese company known for its precision timekeeping. Miyota movements are widely used in the watch industry, and the 8215 is one of their well-established workhorse movements.

Key Features

  • Reliability: The Miyota 8215 is often praised for its robust and reliable performance. It’s a movement that keeps time accurately over extended periods, making it a popular choice for many watch brands.
  • Cost-Effective: One of the significant advantages of the Miyota 8215 is its affordability. This movement offers a good miyota 8215  between cost and quality, making it an attractive option for both entry-level and mid-range watches.
  • Smooth Sweeping Seconds Hand: The Miyota 8215 provides a smooth, 21,600 beats per hour (BPH) sweep for the seconds hand, giving the watch a more luxurious appearance compared to lower-beat movements.

The NH35 Movement

Background and History

The NH35 is manufactured by the Japanese company TMI (Time Module Inc.), which is a subsidiary of the world-renowned Seiko Epson Corporation. TMI movements are well-regarded for their durability and accuracy.

Key Features

  • Durability: The NH35 is known for its robust construction, making it resistant to external shocks and vibrations. This durability ensures that the movement can withstand daily wear and tear.
  • Reliability: Like the Miyota 8215, the NH35 is a reliable workhorse movement that can keep accurate time over an extended period.
  • Cost-Effective: The NH35 is also competitively priced, making it a popular choice for watch brands that want to offer affordable automatic watches to their customers.

Miyota 8215 vs. NH35: The Differences

While both the Miyota 8215 and NH35 have many similarities, there are some key differences to consider when choosing between them for a watch movement:

  1. Beat Rate: The Miyota 8215 operates at 21,600 BPH, while the NH35 runs at a slightly higher beat rate of 21,600 BPH. This means that the NH35’s seconds hand has a slightly smoother sweep, which some watch enthusiasts prefer.
  2. Power Reserve: The NH35 typically has a longer power reserve compared to the Miyota 8215. While the exact duration can vary depending on the specific watch and how it’s regulated, the NH35 generally provides a power reserve of around 40 hours, while the Miyota 8215 offers about 42 hours.
  3. Origin: The Miyota 8215 is a movement from Citizen, while the NH35 is a product of TMI, a subsidiary of Seiko Epson Corporation. Some watch enthusiasts may have brand preferences based on the manufacturer’s reputation.


Both the Miyota 8215 and NH35 are reliable, cost-effective automatic watch movements that have found their place in the world of horology. Choosing between them depends on your specific needs and preferences, such as beat rate, power reserve, and brand reputation. Ultimately, these movements are the beating heart of many beloved timepieces, each contributing to the rich tapestry of the watchmaking industry. Whether you’re a watchmaker or a watch enthusiast, understanding the differences between these movements can help you make informed decisions when it comes to selecting the perfect watch for your collection.

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