King Seiko Hi-Beat – Ref. 5625-7000 (Daini Fabrik, December 1969)

This King Seiko Hi-Beat , reference 5625-7000 , dates from December 1969 and represents the pinnacle of Seiko's mechanical precision before the quartz revolution. The watch was completely disassembled, cleaned, and professionally serviced in Japan in October 2025 .

It is in good, original condition , bears the original KS crown , and has been fitted with a new black leather strap . The gold medallion on the case back is missing, which is a common issue with this model.

Technical data

• Reference: 5625-7000
• Serial number: 9Dxxxx (December 1969)
• Movement: Automatic caliber Seiko 5625A Hi-Beat , 28,800 A/h, 25 jewels
• Functions: Hour, minute, second, date (with quickset)
• Case: Stainless steel, satin/polished, "WATERPROOF" engraving
• Diameter: approx. 37 mm (excluding crown)
• Lug-to-lug: 41.8 mm
• Height: 9.8 mm
• Strap lug width: 18 mm
• Weight: 38 g (including leather strap)
• Revision: Complete disassembly and cleaning in Japan (10/2025)

Design and background

The 5625-7000 model belongs to the later generation of the King Seiko series , manufactured in the Daini movement . The watch combines classic Japanese understatement with the highest precision: clean lines, sharp edges, and a case in the style of the "Grammar of Design," developed for Seiko by Taro Tanaka.

The caliber 5625A used in this watch is a true high-beat movement with 28,800 vibrations per hour – designed for maximum accuracy and stability. It belongs to the same movement family as the 56KS caliber, which was also used in later Grand Seiko models.

Historical context

The King Seiko was created in the early 1960s as a direct competitor to the Grand Seiko – both series served to demonstrate Seiko's technical capabilities at the highest level.
While the Grand Seiko was produced at the Suwa factory, the Daini factory manufactured the King Seiko – an internal competition that led to enormous progress in precision and finishing.

The 5625-7000 Hi-Beat offered here marks the transition to the late 1960s, when Seiko dominated international chronometer competitions. With its minimalist dial, distinctive case shape, and robust movement, it is considered one of the last purely mechanical masterpieces before the quartz era .

Condition

The watch is in good, original condition with age-appropriate signs of wear. The dial is clean and even, and the case has sharp edges. The movement runs accurately. The leather strap is new and unworn.

Warranty (used)
This is a used item. The limitation period for claims based on defects (statutory warranty) is 12 months from delivery.

Notice
As this is a pre-owned watch, water resistance cannot be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.