The 45KS was introduced in 1968 with the brand knew 4500 caliber designed by Dani Seikosha. It featured an angular case with sharp edges with a reference number 45-7000. The 4500 movement was designed as a hi-beat successor to the 4400 series of movements. It is a manual wind caliber that ticks at 36,000 beats per hour, or 10 times per second. In 1969, a new case design was released. The 8010, which can be described as a precursor to the well known "Turtle" case design. This particular watch is the "Chronometer" variant. It was certified by the Japanese Chronometer Inspection Institute, and was held to the same rigorous standards as Swiss made chronometers at the time. Overall, this watch is in (C) good condition. Minor scratches and scuffs can be seen on the sides of the case as well as the acrylic crystal. Some minor patina can be seen on the dial as well. Please see all photos.

- Ref No. : 4502-8010
- Serial No./Year: 061391-/-1970
- Case:
    37.25mm diameter, 18mm lug width, 9.65mm thickness, 42.2mm Lug-to-lug.
    Stainless Steel
- Crystal: Plexiglass/Acrylic
- Movement & Accuracy: 
    Caliber: 4502
    Complications: Central Seconds, Quickset Date
    Measured Accuracy: +2 sec/day.
    Amplitude: 181°
    Beat Rate: 36000 A/h
- Band: Seiko Steel Bracelet (Will Fit ~ 6.5" wrists)
- Condition Rank: C, Good Condition. Please See Photos.
- Country of Manufacture: Japan

Condition Rank Guide:
-N: Item is in New Old Stock condition (NOS). Shows little to no signs of wear apart from some minor handling wear.
-A: Item is in Excellent condition. Micro-scratches can be seen on the sides of the case, bezel, and/or bracelet. No pitting/gouges on the case or scratches in the crystal.
-B: Item is in Very Good condition. Minor scratches and scuffs can be seen on the sides of the case, bezel, and/or bracelet. No pitting/gouges on the case or deep scratches on the crystal.
-C: Item is in Good condition. Moderate scratches and scuffs can be seen on the sides of the case, bezel, and/or bracelet. Minor pitting/gouges may be visible on the case. One or less deep scratches may be visible on the crystal. See photos.
-D: Item is in Fair condition. Heavy scratches and scuffs can be seen on sides of the case, bezel, and bracelet. Significant pitting or gouges are visible on the sides of the case and the crystal shows multiple deep scratches
-F: Item is in Poor condition. Item is not functional. For parts or repair only.