Seiko Mod - Seiko NH Series Movements Explained

The NH series movements from Seiko are automatic mechanical movements that have been widely used in various wristwatches. The NH movements are manufactured by the Time Module (TMI) division of the Seiko Instruments Inc. (SII) in Japan. These NH series movements are known for their reliability and are commonly found in various affordable and mid-range watches. From micro brands to modding, these movements have a proven track record for affordability and reliability. Here's a general breakdown of the most common NH series movements:

NH34 GMT
Type: Automatic
Jewels: 24
Vibrations per hour: 21,600 bph
Power Reserve: Approximately 41 hours
Hacking Second Hand: Yes
Additional Features: Date/GMT Hand

NH35
Type: Automatic
Jewels: 24
Vibrations per hour: 21,600 bph
Power Reserve: Approximately 41 hours
Hacking Second Hand: Yes
Additional Features: Date

NH36
Type: Automatic
Jewels: 24
Vibrations per hour: 21,600 bph
Power Reserve: Approximately 41 hours
Hacking Second Hand: Yes
Additional Features: Day/Date

NH38
Type: Automatic
Jewels: 24
Vibrations per hour: 21,600 bph
Power Reserve: Approximately 41 hours
Hacking Second Hand: Yes
Additional Features: No Date