Seiko SNXS77J1
The SNXS77 is a blue-dial Seiko 5 on the 7S26, in a 37mm polished case with a display back, Hardlex crystal, a crown at 4 and 30m water resistance. The J1 suffix marks the Japan-made version: the dial prints MADE IN JAPAN either side of 6, with the dial code 7S26-0360 at the lower right, while the case code is 7S26-0480. The 7S26 has 21 jewels and runs at 21,600 bph with about 41 hours of reserve; it neither hacks nor hand-winds. Lugs are 19mm, so 18mm and 20mm straps fit badly. The folded-link bracelet it shipped with is light, and replacing it is the usual first change.
| Caliber | 7S26 |
|---|---|
| Line | Seiko 5 |
| Case size | 37mm |
| Lug width | 19mm |
| Crystal | Hardlex |
| Water resistance | 30m |
What size strap does the SNXS77 take?
19mm. That is an uncommon size, so most aftermarket straps sold in 18mm or 20mm will either rattle or need squeezing in. The factory folded-link bracelet is also 19mm at the lugs.
Can the 7S26 movement be hand-wound?
No. The 7S26 caliber inside is an automatic movement that relies solely on wrist motion to wind the mainspring. It does not support manual hand-winding through the crown, and it does not hack, meaning the seconds hand continues moving while setting the time.
