The 52KS series was the last King Seiko, produced by Daini Seikosha between 1971 and 1975. Suwa Seikosha and Daini Seikosha were the two internal segments of Seiko competing against each other in the high-end watch segment. Suwa Seikosha largely developed and produced Grand Seiko while Daini Seikosha developed and produced King Seiko. The 6000 were one-piece monoblock cases while the 7000 and 8000 cases had removeable screw backs.

The 52KS is arguably the peak of the automatic King Seiko line. It was the swan song of King Seiko as the brand ended in 1975.

Pre-owned King Seiko Watch. Reference 5246-6000. This watch is the "Special" variant. It features the Seiko Hi-Beat Caliber 5246 which was a certified chronometer movement. Overall, this watch is in (D), Fair condition. The crystal shows multiple scratches and scuffs. The watch does run, gaining around 80 seconds per day. The quickset day/date mechanism does function, but when setting the date, moderate resistance from the watch winding can be felt. 

- Ref No. : 5246/6000
- Serial No./Year: 151126/1961
- Case:
    35mm diameter, 18mm lug width, 9.5mm thickness, 39mm Lug-to-lug.
    Stainless Steel
- Crystal: Plexi/Acrylic
- Movement & Accuracy: 
    Caliber: Seiko Cal. 5246
    Complications: Quickset Day/Date
    Measured Accuracy: +83 sec/day.
    Amplitude: 138°
    Beat Rate: 28,800 A/h
- Band: Replacement Leather
- Condition Rank: D, Fair Condition.
- 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.