Cro WatchesSeiko 7S26 guide: the neo-vintage Seiko 5 (vs 7S36, 4R36, NH36)
Updated 12 October 2026 · Cro Watches, Vilnius
The 7S26 is probably the most-worn mechanical movement of the last 30 years. Introduced in the mid-1990s, it powered the SKX divers and the SNK Seiko 5 range, and it has a reputation for running for decades with almost no attention.
7S26 at a glance
| Type | Automatic, day-date |
|---|---|
| Jewels | 21 |
| Beat rate | 21,600 beats per hour |
| Power reserve | about 41 hours |
| Seiko's accuracy spec | −20 to +40 seconds a day |
| Hand-winding / hacking | No / no |
| Era | 1996 to the late 2010s |
7S26 vs 7S36 vs 4R36 vs NH36
| Movement | Jewels | Hand-winding | Hacking | Found in |
|---|---|---|---|---|
| 7S26 | 21 | No | No | Seiko 5 SNK, SKX divers |
| 7S36 | 23 | No | No | Seiko 5 models mainly for Asian markets |
| 4R36 | 24 | Yes | Yes | Seiko 5 Sports and Prospex from the 2010s |
| NH36 | 24 | Yes | Yes | The 4R36 sold to other watch brands |
The 7S36 is a 7S26 with two extra jewels in the winding system. Day to day, they behave the same. The 4R36 added hand-winding and a seconds hand that stops when you set the time. If you want those two features, look for a 4R36; if you want a classic, the 7S26 is the one.
Why neo-vintage 7S26 Seiko 5s are worth a look
- Tough: the 7S26 is famous for running for years without a service.
- Modern size: 37–42 mm cases, a little larger than 1970s Seikos.
- Great dials: bright yellow, lume dials, Arabic numerals, military-style 24-hour rings.
- Affordable: good examples sell for about €70–130 in Europe.
How to set and wind a 7S26
Pull the crown to the first click to set the day and date (one direction each), then fully out to set the time. It can't be wound by hand: give it a gentle side-to-side swing to start it. Full steps: setting the day and date and winding a Seiko 5.
Dating a 7S26 watch
As with older Seikos, the first digit of the serial is the year and the second is the month. A 7S26 serial starting 98 means August 1999 or 2009; the model's production years tell you which. See the serial number decoder.