Vintage Watch | Seiko Silverwave 6306-8000 (Actus / Original Bracelet)

Seiko Silverwave 6306-8000: December 1976 Actus Dial, Original Bracelet (Fully Serviced) 

This Seiko Silverwave 6306-8000 is a December 1976 Japanese-market surface diver with a mint silver dial, mint Hardlex crystal, and its original Seiko bracelet. Unlike an earlier Silverwave we listed that carried 5 Actus under Seiko, this example prints Actus alone — and that Actus lettering is part of why the dial works: a sharper, more futuristic font against the cursive Silverwave script at six. Minor usage marks sit on the case only. Fully serviced by our watchmaker in Japan, with all functions working perfectly.

Why the Seiko Silverwave 6306-8000 still stands out

In 1976 Seiko relaunched Silverwave on Calibre 6306A — the same 21-jewel, 21,600 bph automatic family as the first JDM Turtles, with hacking seconds and bilingual Kanji/English day-date. Reference 6306-8000 is the lugged case of that short mid-70s run: 38 mm across, about 43 mm lug-to-lug, 20 mm between the lugs, screw-down crown at four, and a screw-back with the raised double-wave emblem. Dressier than a Turtle, same surface-diver DNA — the under-hyped sibling collectors notice once they see one on the wrist.

This Seiko Silverwave 6306-8000 (December 1976 · Actus)

Caseback engraving reads 6306-8000 with serial 6D4167 (December 1976). Silver dial with applied baton indices, dauphine hands, day-date at three, and Actus (not 5 Actus) under Seiko; Silverwave script above six. End links marked XBA; clasp signed SEIKO / ACTUS. Ships on that original bracelet as photographed — no strap pairing on this listing.

Seiko Silverwave 6306-8000 condition & what you receive

A strong everyday Silverwave. The stainless case shows only minor usage marks — honest hairlines on the flanks and lugs, geometry still sharp. The dial is mint and the crystal is mint, so the Actus branding reads clean. Original bracelet and Actus-signed clasp complete it. It has been fully serviced by our watchmaker in Japan, and all functions are working perfectly.

Read more about vintage Seiko divers (incl. Silverwave)

Want the longer story of Seiko’s diver line — including how the mid-70s Silverwave sits beside the Turtle? We wrote it up on the blog.

Read the Vintage Seiko Diver Guide

Specification:

Maker: Seiko (Suwa · JDM)

Model: Seiko Silverwave 6306-8000 (Actus dial · not 5 Actus)

Era: 1976 Dec (caseback serial 6D4167)

Case Diameter: 38 mm

Lug to Lug: 43 mm

Lug Width: 20 mm

Case Condition: Minor usage marks on the case only · sharp planes retained · screw-down crown at 4 · double-wave screw-back

Dial Condition: Mint silver dial · Actus under Seiko in futuristic font · Silverwave script · Kanji/English day-date · 21 jewels

Crystal: Mint Hardlex

Movement: Cal. 6306A automatic (21 jewels, 21,600 bph, hacking, bilingual day-date) — fully serviced by our watchmaker in Japan; all functions working perfectly

Strap / Accessories: Original Seiko stainless bracelet · Actus-signed clasp · XBA end links (as photographed)

A December 1976 Silverwave 6306-8000 with the Actus dial treatment, mint dial and crystal, minor case wear only, the original bracelet, and a full service by our watchmaker in Japan.