Seiko SilverWave 6306-806A - Rare Automatic Caliber SilverWave.
The Seiko SilverWave is one of the brand's most interesting and lesser-known series produced in the 1970s. While various SilverWave models are available on the market today, it's truly rare to see a SilverWave equipped with the automatic 6306 caliber. The 6306-806A is one of the most unique examples, combining both this movement and the SilverWave signature in the same case.
The SilverWave family is Seiko's first model line to embrace the idea of producing watches suitable for light diving. Therefore, like most SilverWaves, the 6306-806A is equipped with a screw-down crown and a secure screw-back caseback. These features were considered a significant leap forward in water resistance and engineering for its time.
There's also a very subtle detail about this reference: if you look at models with the 52xx "Special" caliber family, you'll usually see the word "Special" above the 6 index. However, Seiko removed this wording from the SilverWave versions. This move, likely made to simplify the dial and make room for the SilverWave logo, demonstrates the brand's emphasis on typographic balance and design simplicity at the time.
The clean white dial, Arabic numeral index alignment, and yellow second hand make this watch special not only technically but also aesthetically. The example in the photos is from 1977. It is sold with its original steel bracelet, additional black leather strap, and carrying case.
Features
Brand / Series Seiko SilverWave
Reference 6306-806A
Year of Manufacture 1977
Caliber Seiko Automatic 6306A - 21 jewels, hacking
Case Stainless steel
Glass Hardlex crystal
Dial White, Arabic numeral indices, yellow second hand
Crown Screw-down
Case Thickness 12.2mm
Strap Original Seiko steel bracelet + extra black leather strap
Water Resistance (period): 70m "SilverWave" standard
Condition Notes
Case: Matte finish in very good condition, sharp lines preserved.
Crystal: Scratch-free and clean.
Dial: Original, printing and indices clear.
Crown: Screw-down, functions perfectly.
Movement: Full-function 6306A, date/day changes smoothly.
Bracelet: Original Seiko steel bracelet. New black leather strap included.
Note: The case back is not part of this watch; it uses the Seiko 5 Actus case back, reference 6106-7480. It is fully compatible with the case and presents no functional problems (this is for informational purposes only).
A Final Word
The Seiko SilverWave 6306-806A, with its technical design and rarity, is a model that should be on the collector's radar. With its screw-down crown, 6306 caliber, and simple yet powerful dial design, it embodies the classic Seiko diver DNA in everyday wear.
A perfect piece for those seeking both aesthetic and technical value.
A truly rare example of the SilverWave.
The product you are viewing was manufactured in 1977.
Professionally overhauled and FULLY SERVICED (the movement has been completely disassembled and its components cleaned. Once oiled and adjusted, your watch will function flawlessly without any surprises. (It is maintenance-free for 3 years unless exposed to direct water or high humidity for extended periods.)
Item Condition: Tested, fully functional, and in working order.
