In the realm of affordable, reliable automatic watches, Seiko calibers NH35 and NH36 reign supreme. These robust movements power a vast array of timepieces, from iconic Seiko 5 models to countless enthusiast favorites.
But with seemingly minor differences on paper, watch enthusiasts often ponder: Which Seiko caliber reigns supreme? This comprehensive guide delves into the intricacies of both movements, equipping you to make an informed decision for your next timepiece.
Demystifying Automatic Movements
Before diving into the specifics of NH35 and NH36, let’s establish a foundational understanding of automatic movements. Unlike their quartz counterparts powered by batteries, automatics harness the wearer’s natural movements to power the watch.
An oscillating weight (rotor) rotates with your wrist movements, winding the mainspring, which in turn provides energy to the movement and keeps the watch running. Automatic movements offer a touch of mechanical magic, a constant reminder of the intricate engineering powering your timepiece.
Specifications Side-by-Side
A close examination reveals a high degree of similarity between NH35 and NH36 calibers. Both boast:
24 jewels: These jewels act as friction-reducing bearings within the movement, enhancing efficiency and longevity.
Automatic and hand-winding capabilities: For added convenience, you can manually wind the crown to store energy when the watch isn’t worn for extended periods.
Hacking seconds: Pulling the crown out to its hacking position stops the second hand, allowing for a precise time setting.
Approximate 41-hour power reserve: Once fully wound, the watch will continue to run for approximately 41 hours before requiring another winding (automatic or manual).
21,600 beats per hour (vph): This refers to the frequency of the balance wheel’s oscillation, translating to six vibrations per second. This mid-range beat rate offers a good balance between smoothness and efficiency.
Durability and reliability: Seiko NH’s movements are renowned for their robust construction and ability to withstand everyday wear and tear.
| Feature | NH35 | NH36 |
|---|---|---|
| Jewels | 24 | 24 |
| Automatic & Hand-Winding | Yes | Yes |
| Hacking Seconds | Yes | Yes |
| Power Reserve | ~41 Hours | ~41 Hours |
| Beats per Hour (vph) | 21,600 | 21,600 |
| Date Display | Yes | Yes |
| Day Display | No | Yes |
The Key Distinction: Unveiling the Date Dance
The primary difference between NH35 and NH36 lies in their date complication. The NH35 features a date display window at the 3 o’clock position, allowing you to view the current date. The NH36, however, incorporates both a date and day display window, showcasing the day of the week alongside the date.
For those who value a complete date function with both day and date displayed, NH36 emerges as the clear choice. However, if a simpler date display suffices, the NH35 remains a reliable option.
Exploring Additional Variations
While NH35 and NH36 are the most common Seiko movements in this caliber family, a few additional variations exist:
NH37: This movement builds upon the NH36 by incorporating a 24-hour indicator, ideal for those who frequently travel across time zones.
NH38: This variation omits the date display altogether, offering a clean, minimalist aesthetic for enthusiasts who favor a no-date complication.
NH39: Similar to the NH38, this movement excludes the date display but adds a power reserve indicator, allowing you to monitor the remaining power in the mainspring.
NH70: This upgraded movement boasts a higher beat rate of 36,000 vph, resulting in smoother second-hand sweeping and potentially improved accuracy. However, it’s less commonly found compared to NH35 and NH36.
Exploring Manufacturing Locations
Seiko NH35 and NH36 calibers hail from two primary locations: Japan and Malaysia.
Japan: Movements produced here are known for meticulous quality control and exceptional finishing, potentially resulting in smoother operation. These watches often command a slightly higher price tag.
Malaysia: Seiko’s Malaysian facilities produce NH movements adhering to strict quality standards. These movements offer a more budget-friendly option without sacrificing core reliability.
The Choice and Transparency
The choice boils down to personal preference and budget. Some manufacturers disclose the movement’s origin, but if not, contacting them can clarify it.
Beyond Geography
Seiko maintains a global presence with design, research, and development spread across various locations. All NH movements undergo rigorous testing to ensure they meet Seiko’s quality benchmarks, regardless of manufacturing location.
Performance and User Experience
The real-world performance of both NH35 and NH36 calibers is generally excellent. Here’s a closer look at what you can expect:
Accuracy: With proper care and regulation, both movements can achieve accuracy within -20 to +40 seconds per day, which falls within acceptable ranges for most users.
Durability: NH calibers are renowned for their ability to withstand everyday wear and tear. They can handle bumps, knocks, and even moderate shock thanks to their robust construction.
Maintenance: Regular servicing (every 5-7 years) is recommended to maintain optimal performance and longevity. This typically involves cleaning, lubrication, and potential regulation by a qualified watchmaker.
Upgradability: For enthusiasts, certain aftermarket parts can be used to modify NH movements. However, this customization should be undertaken by experienced watchmakers to ensure proper functionality.
Choosing Your Caliber
The decision between NH35 and NH36 ultimately boils down to your specific requirements:
Choose NH35 if:
- You prioritize a clean, minimalist aesthetic without a day display.
- You’re on a budget and the NH36’s slight price increase isn’t justified by the additional day display.
Choose NH36 if:
- You value a complete date function with both day and date displayed.
- The extra functionality of the day display outweighs any minor price difference compared to the NH35.
Popular Seiko Models and Series Powered by NH35 and NH36 Calibers
Seiko’s NH35 and NH36 calibers are the driving force behind a vast selection of Seiko and Seiko-affiliated watches, catering to a wide range of styles and budgets. Here’s a breakdown of some of the most popular models and series:
Seiko 5 Series:
The quintessential embodiment of Seiko’s automatic heritage, the Seiko 5 series offers a diverse array of models powered by NH calibers. These watches are renowned for their:
- Affordability: They represent a fantastic entry point into the world of automatic watches.
- Durability: Built to withstand everyday wear and tear, they’re perfect for everyday use.
- Style: From classic dress watches to sporty field watches, there’s a Seiko 5 to suit every taste.
Popular Seiko 5 Models with NH Movements:
- SNK80x Series: A classic field watch design with a variety of dial colors and strap options. (utilizes NH35)
- SNXS7x Series: A more dressy option with a sleek stainless steel case and various dial variations. (utilizes NH35)
- SRPD Series (newer Seiko 5 Sports): A modern take on the classic Seiko 5 design, featuring a sporty aesthetic and upgraded features like a slightly larger case and a screw-down crown. (utilizes NH35 or NH36)
Seiko Prospex Series:
This series encompasses a broader range of Seiko divers, sports watches, and tool watches. While higher-end Prospex models utilize more advanced movements, some utilize NH calibers for their reliability and affordability. These Prospex models offer:
- Enhanced Functionality: Features like water resistance suitable for diving or increased shock resistance cater to specific activities.
- Sporty Aesthetics: Bold designs and durable materials make them ideal for adventure seekers.
Popular Seiko Prospex Models with NH Movements:
- SRPE Series (Prospex Divers): An affordable automatic diver option within the Prospex range, featuring a classic diver aesthetic and 200-meter water resistance. (utilizes NH36)
- SUN023 (Prospex Solar Diver): This unique model combines an NH36 movement with solar charging capabilities for extended power reserve. (utilizes NH36)
Orient:
A subsidiary of Seiko Epson, Orient offers a compelling selection of automatic watches powered by NH movements. Orient watches often provide:
- Unique Design Language: Orient boasts a distinct design aesthetic, often incorporating domed crystals and distinctive hands.
- Exceptional Value: Orient watches offer excellent features and quality at very competitive price points.
Popular Orient Models with NH Movements:
- Mako Series: A popular and affordable automatic diver option with a bold design and 200-meter water resistance. (utilizes NH35)
- Kamasu Series: A modern diver design with a slimmer profile and various dial color options. (utilizes NH36)
- Bambino Series: A classic dress watch collection featuring elegant designs and a variety of dial options. (utilizes NH35)
Remember, this is just a glimpse into the vast selection of watches powered by Seiko NH35 and NH36 movements. With so many options available, you’re sure to find the perfect timepiece to suit your style and budget.
FAQs
Which Seiko caliber is more accurate, NH35 or NH36?
There’s no inherent difference in accuracy between NH35 and NH36. Both movements, when properly regulated, can achieve similar accuracy levels.
Are Seiko NH movements considered good quality?
Yes, Seiko NH calibers are renowned for their reliability, durability, and affordability. They offer excellent value for the price point.
Can I replace an NH35 movement with an NH36 in my watch?
Potentially, but it depends on the specific watch model. The movements share similar dimensions, but dial compatibility and case modifications might be necessary. Consulting a qualified watchmaker is recommended for such replacements.
Are there any alternatives to Seiko NH movements?
Several other manufacturers produce automatic movements in a similar price range. Popular options include Seiko’s own higher-beat 4R/6R series or movements from Orient, Citizen, and Miyota.
Where can I buy a watch with a Seiko NH movement?
Authorized Seiko retailers, online retailers specializing in Seiko watches, and some department stores carry watches powered by NH calibers.
Conclusion
Seiko’s NH35 and NH36 calibers represent the workhorses of the automatic watch world. They provide reliable timekeeping, robust construction, and excellent value for money.
Whether you seek a clean, minimalist aesthetic with the NH35 or value the complete date function offered by the NH36, both calibers stand ready to faithfully accompany you on your daily adventures. So, choose your champion, wind it up, and experience the timeless allure of a Seiko automatic watch.