Seiko - Sportsmatic SilverWave - No reserve price - 697990 - Men - 1964

Now available at auction from Second Vintage This is a historically significant timepiece that represents a pivotal moment in Japanese watchmaking history. The Seiko Sportsmatic SilverWave is widely recognized by collectors as the direct precursor to Seiko's legendary professional diver line, including the famous 62MAS. Featuring a rare "Water 30 Proof" dial and the distinctive internal rotating count-up bezel, this example from December 1964 captures the genesis of the sport watch era. It combines robust engineering with an aesthetic that has aged into a unique vintage character, making it a compelling acquisition for serious Seiko enthusiasts. Brand: Seiko Model: Sportsmatic SilverWave Reference Number: 697990 Serial Number: 4D00923 Movement: Automatic Caliber 2451 Dial: Silver sunburst with internal rotating bezel Case Size: 37 mm Case Material: Stainless Steel Production Year: 1964 Condition: Fair vintage condition. The watch exhibits a strong presence with a heavily patinated dial and honest wear on the case consistent with decades of use. The dial’s original print is intact, while the applied indices and hands show oxidation and luminous aging. The case retains its original shape and proportions, with some notable surface scratches and small dings, and the crystal remains generally clear with minor signs of age. Dial and Hands The watch features a silver sunburst dial that displays a heavy, honest patina consistent with its age and history. There is visible aging, spotting, and warm discoloration across the surface, giving the piece a true "tropical" vintage aesthetic. The dial retains its original "Water 30 Proof" text, a detail highly sought after by collectors. The applied block indices and dauphine hands show oxidation and aging to the luminous material. Surrounding the dial is the model's signature black internal rotating bezel ring with silver markings, which adds depth and contrast to the face. Case and Crystal The stainless steel case measures 37mm and features the characteristic 4 o'clock crown placement found on early SilverWave models. The case profile remains strong with defined lugs, though it shows surface scratches and dings typical of a watch that has been enjoyed for decades. The screw-down caseback features the wave symbol and clearly legible reference and serial numbers. The acrylic crystal is generally clear, allowing for good visibility of the dial character. Movement Powering the watch is the Seikosha Sportsmatic automatic Caliber 2451, a 17-jewel movement known for its durability. The movement is clean in appearance and is currently running within vintage tolerances. Timegrapher testing indicates a daily deviation of approximately -47s to -53s, which indicates a functioning mechanical movement. Strap The watch has been paired with a new black leather strap featuring an alligator grain pattern. The strap is in unworn condition and provides a classic, dressy contrast to the sporty nature of the watch head, making it suitable for immediate wear. Condition This example is in fair vintage condition, presenting as an honest survivor with significant signs of age. The heavy patina on the dial and the wear on the case attest to its life as a tool watch from the mid-1960s. It appeals primarily to collectors who value original character and historical significance over pristine aesthetics. Dimensions The case diameter is 37 mm excluding the crown, offering a classic vintage fit that sits comfortably on a variety of wrist sizes. Remarks The Reference 697990 SilverWave is a cornerstone piece for any comprehensive Seiko collection. Finding an example with the "30 Proof" designation dating back to 1964 allows the owner to wear a piece of the timeline that led directly to Seiko's professional ISO-rated divers. History Launched in the early 1960s, the SilverWave was Seiko's first serious attempt at a water-resistant sports watch tailored for active use. It introduced the internal rotating bezel and the screw-down caseback to a wider audience. This specific model bridges the gap between the dressier Sportsmatic line and the dedicated professional divers that would follow shortly after, securing its place in horological history. / Second Vintage SKU: SEI-SSD-0042