Seiko (SII) Caliber NH38A
|Manufacturer||Seiko (SII, TMI)|
|Vibrations Per Hour
|Diameter||27.40mm (outside) / 29.36mm (casing)|
|Functions||Hours, minutes, central seconds|
|Country of Manufacture||Japan/Maylasia|
||Invicta (add more in the comments below)|
The Seiko caliber NH38A is very similar to the popular caliber NH35A.The NH38 series is often found with an open balance wheel at 9:00 on the dial.
Time Module (TMI) claims an accuracy rating of -20~+40 seconds per day.
What is the difference?
Unlike the NH35A, the NH38A is a basic three hand watch and does not have a day or date complication.
Japan or Malaysia?
The complete Japanese-made caliber number is NH38A3J. For the Malaysia variant, the number is NH38A3M.
- For complete specs and drawings, see this pdf
The large photo below is of a Seiko NH38A movement in an Invicta 22744 watch.
Submitted by Nathaniel B.