Seiko NH72 (TMI NH72A) caliber vs Sellita SW100-1 caliber: specs compared
Updated 05 September 2026.
11
specs differ
Seiko NH72 (TMI NH72A) caliber and Sellita SW100-1 caliber differ on 11 specs: maker, size, casing diameter, movement height, frequency, jewels.
| Spec | Seiko NH72 (TMI NH72A) caliber | Sellita SW100-1 caliber |
|---|---|---|
| Maker | Seiko Instruments / Time Module (TMI) | Sellita |
| Size | 12 ligne | 8 3/4 ligne |
| Casing diameter | 27.40 mm | 20.00 mm |
| Movement height | 5.32 mm | 3.35 mm |
| Frequency | 21,600 A/h (3 Hz) | 28,800 A/h (4 Hz) |
| Jewels | 22 | 25 |
| Winding | automatic, bidirectional, hacking and hand-wind | automatic, bidirectional |
| Calendar / layout | full skeleton, no date, hacking | centre seconds, date at 3 |
| Hand fitting | hour / minute (skeleton, no seconds) | small-caliber hour / minute / second bores |
| Stem | NH72 stem | SW100 stem |
| Power reserve | more than 41 h | approx. 40 h |
Questions and answers
How do Seiko NH72 (TMI NH72A) caliber and Sellita SW100-1 caliber compare?
Seiko NH72 (TMI NH72A) caliber and Sellita SW100-1 caliber differ on 11 specs: maker, size, casing diameter, movement height, frequency, jewels.