Pop Culture

An Introduction to Seiko’s Caliber NH35A Movement

Seiko’s NH35A, known as the unbranded version of the Seiko caliber 4R35 movement, has become a well-used movement amongst micro brands such as Vostok, Lum-Tec, Spinnaker, and D1 Milano. Nevertheless, why is this movement so readily used in robust dive watches, vintage-inspired pieces, and numerous Seiko-enthusiast-modified pieces? Let’s dive in and find out.


The movement started hitting the market in late 2011 and early 2012. It’s one of the finest microbrand-beloved movements that is an upgrade on the NH25 that came out in 2008. The caliber has become a fan-favourite amongst Seiko fans, especially those who modify watches or create their own creations from scratch. This love for the movement primarily came due to its compatibility, affordability, and dependability.


NH35 has an accuracy range of -20~+40 seconds per day under normal conditions, according to a test done by Time Module. The movement has a diashock system, a 41-hour power reserve, and 24 jewels. It also has a vibration frequency of 21,600 vibrations per hour.

The movement is 29.36mm in casing diameter and has a lift angle of 53 degrees. The NH35A is a hand-windable movement.

Watches Carrying the Movement

  • D1 Milano Subacqueo Lido Diver
  • Spinnaker Spence “Batman” Diver”
  • Vostok Europe Lunokhod-2 (NH35A-620A634)

Buying a NH35A Movement

NH35A is widely available for around £25 to £50, depending on the platform you are buying it from. eBay, Namoki, and other watch-enthusiast shops will stock this item due to its significant popularity. However, before buying, read up the reviews and try to find a reputable buyer, as knock-off movements are commonly advertised as the NH35A (Yes, even though it’s relatively cheap to acquire).

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