Seiko Actus SS 'Serviced' 6106-7520 (1974)

Now available at auction from Second Vintage A classic and well-preserved example of Seiko's 1970s Actus line, this timepiece features a striking deep blue sunburst dial perfectly complemented by its distinctive factory faceted crystal. Fitted with its original signed bracelet, it showcases the C-shaped cushion case and recessed crown that defined the era's Japanese Domestic Market styling. Brand: Seiko Model: Actus SS Reference Number: 6106-7520 Serial Number: 4N9738 Movement: Automatic Caliber 6106 Dial: Deep blue sunburst with applied faceted indices Case Size: 37 mm (excluding the crown) Case Material: Stainless steel Production Year: 1974 Condition: Good vintage condition. Movement serviced on 7 October 2026. Timegrapher: +30+35s/day, running strong and steady. Dial and Hands The dial is vibrant and well-preserved, featuring a deep blue sunburst finish in excellent condition. Applied faceted indices and logos are clean and bright, and there is no visible spotting, staining, or print loss. The clean and matching polished baton hands retain their luminous inserts, showing minimal signs of oxidation. The lume appears intact and age-consistent. The dial prominently features the "SS" designation, standing for "Second Setting," which highlights the movement's hacking capability. Case and Crystal The 37mm stainless steel C-shaped cushion case displays honest vintage wear, with brushed upper surfaces and polished flanks. The edges remain reasonably defined, though the case shows moderate scratches and scuffs consistent with age and normal use. The integrated polished smooth bezel exhibits light scratches and scuffs matching the case wear. Positioned at 4 o'clock is the recessed, unsigned crown, which is correct for this model and shows normal handling wear. The distinctive factory faceted mineral crystal shows minor surface scratches and light edge wear, but clarity remains good. Movement Powering the watch is the automatic Caliber 6106, a 23-jewel movement that beats at 21,600 bph and features a hacking seconds function. The visible rotor exhibits noticeable spotting, surface oxidation, and discoloration, while the movement plates appear relatively clean by comparison. The movement bears "SEIKO," "23 JEWELS," and "JAPAN" engravings. Timegrapher testing indicates a rate of +30+35s/day. Performing well within expected vintage tolerances; running strong and steady. The movement was serviced on 7 October 2026. Strap The watch is fitted with its original stainless steel folded-link bracelet, stamped with "XAA" endlinks. The clasp is clearly signed "SEIKO 5ACTUS." Presenting an original and well-worn character, the bracelet shows moderate stretch, surface scratches, and normal wear. It accommodates a maximum wrist size of 17.5cm. Condition Good vintage condition. The movement was serviced on 7 October 2026 and, supported by the recorded timegrapher result, is running strong and steady. The case and bezel show moderate scratches and scuffs consistent with normal use, while retaining reasonably defined edges. The distinctive faceted crystal has minor surface scratches and light edge wear. The deep blue sunburst dial and hands are excellently preserved, with no visible spotting or print loss. The original signed bracelet shows moderate stretch and surface scratches. The movement's rotor displays noticeable spotting and oxidation, though the plates remain relatively clean. Dimensions Case Size: 37 mm (excluding the crown) Remarks This Actus SS offers a fantastic opportunity to acquire a well-preserved piece of 1970s Seiko design. The combination of the vibrant blue sunburst dial, original faceted crystal, and matching signed bracelet makes it a highly appealing example of classic Japanese watchmaking. History The Seiko 5 Actus line was originally created for the Japanese Domestic Market, aimed specifically at young professionals seeking reliable, stylish, and contemporary timepieces. The "SS" designation marks the inclusion of a "Second Setting" or hacking function, an upgraded feature provided by the automatic Caliber 6106. Produced in 1974, this C-shaped cushion case design reflects the bold, distinctive styling that characterized Seiko's domestic offerings during the decade. / Second Vintage SKU: SEI-SSJ-0033