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Seiko 5 Sports Sea Urchin SNZF17 — wrist-works

About This Watch

The Seiko 5 Sports SNZF17 — affectionately known among watch enthusiasts as the “Sea Urchin” — is one of the most iconic and collectable pieces in the entire Seiko 5 catalogue. With its sporty 41mm stainless steel case, unidirectional rotating bezel, and bold black dial with luminous baton markers and hands, this watch has earned a devoted following for its striking resemblance to far more expensive dive watches at a fraction of the price. Powered by the robust 7S36 automatic movement (visible through the exhibition caseback), it offers solid reliability and genuine vintage character. Day and date functions display clearly at the 3 o’clock position. Presented on its original stainless steel sports bracelet with deployment clasp. Worn for several hours prior to listing to confirm smooth, reliable running throughout — an excellent example of a genuinely sought-after Seiko.

Specifications

Brand	Seiko
Model	Seiko 5 Sports “Sea Urchin”
Reference	SNZF17
Movement	Automatic — Calibre 7S36
Jewels	21 Jewels (as stated on dial)
Power Reserve	Approx. 40 hours
Dial Colour	Black with luminous baton markers & hands
Functions	Hours, Minutes, Seconds, Day, Date
Day / Date	3 o’clock position
Bezel	Unidirectional rotating — diver style
Crystal	Hardlex
Caseback	Glass exhibition back
Case Diameter	41mm (excluding crown) / 45mm (with crown)
Lug to Lug	47mm
Lug Width	22mm
Case Thickness	13mm
Water Resistance	100m / 10 ATM
Bracelet	Stainless steel sports bracelet with deployment clasp

Condition

Good to excellent overall condition with minor signs of wear consistent with its age
Fully operational — all functions (day, date, bezel, winding) performing as intended
Black dial clean and crisp — luminous markers and hands intact with no notable damage
Rotating bezel turns smoothly with positive clicks
Glass exhibition caseback intact and clear — 7S36 movement visible and running
Original stainless steel sports bracelet present — shows light surface wear consistent with age
Please refer carefully to all photographs, which form an important part of this description

Please Note

This is a vintage timepiece. While the watch is currently running and functioning, long-term timekeeping accuracy cannot be guaranteed without servicing. As with all vintage automatics that have had a period of inactivity, some regulation may be needed. Minor age-related signs may be present.

Please note the 7S36 movement is non-hacking and non-hand-winding by design — this is normal and expected for this calibre.

We make every effort to describe our items with the utmost accuracy, but vintage watches may exhibit unique characteristics. Customer satisfaction is our highest priority — if you encounter any issues, please contact us before leaving feedback.

Please review all photos carefully as they form an important part of the description.

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Seiko 5 Sports “Sea Urchin” — SNZF17