Seiko NH35/NH36 Automatic Movement 24-Jewel High Accuracy Watch Movement with Day-Date Function

Design and Construction

The Seiko NH35/NH36 automatic movement represents precision engineering at its finest, featuring a robust titanium alloy construction that balances durability with lightweight performance. At just 1.06 ounces (0.03 kg), this compact powerhouse offers remarkable versatility for watchmaking projects. The movement presents two crown position options—3 o’clock standard positioning or 3.8 o’clock offset—providing flexibility for various watch case designs.

The carefully engineered components feature polished surfaces and precise tolerances, ensuring smooth operation and reliable timekeeping. Each movement exhibits the meticulous attention to detail that has made these calibers highly sought after by both watchmakers and enthusiasts alike.

Movement and Performance

At the heart of this timepiece beats a self-winding automatic mechanism with 24 jewels strategically positioned to reduce friction and enhance longevity. The jewel bearings—made from synthetic ruby—allow the movement’s components to operate with minimal wear while maintaining exceptional accuracy over time.

The NH35/NH36 caliber offers both day and date complications with a quick-set feature, allowing for convenient adjustments without cycling through a full 24-hour period. The day display can be configured in either English or an alternative language option based on your preference. When properly regulated, this movement delivers impressive timekeeping precision suitable for daily wear timepieces.

Special Features

The distinguishing feature between these two movement variations lies in their functionality: the NH35 provides date-only capability, while the NH36 offers both day and date displays. Both movements feature:

• Bidirectional automatic winding system
• Hand-winding capability
• Hacking seconds function for precise time setting
• Quick-set date (and day on the NH36)
• 41-hour power reserve when fully wound
• Beat rate of 21,600 vibrations per hour (3Hz)

These technical specifications allow for smooth operation and reliable performance in a variety of watch styles from dive watches to dress pieces. The movement’s moderate size makes it compatible with numerous case designs, while its proven reliability has made it a favorite among custom watchbuilders.

Value and Versatility

This movement represents exceptional value for watch modification enthusiasts, repair professionals, and custom watchmakers. Its combination of reliable performance, accuracy, and reasonable cost has established it as a standard in the industry. The NH35/NH36 series offers:

• Easy servicing due to readily available parts
• Compatibility with numerous aftermarket components
• Proven reliability under various conditions
• Excellent foundation for custom watch projects
• Suitable replacement for similar-sized movements in restoration projects

Whether you’re building a custom timepiece, replacing a worn movement, or exploring horology as a hobby, this caliber provides the perfect balance of performance and accessibility.

Conclusion

The Seiko NH35/NH36 automatic movement delivers professional-grade watchmaking technology in a compact, reliable package. With its day-date functionality, multiple crown position options, and precision engineering, this movement stands as an excellent choice for horological projects ranging from simple modifications to complete custom builds. Experience the satisfaction of working with one of the watch industry’s most respected mechanical movements and elevate your timepiece to new levels of performance and reliability.