Seiko Cal. 4425 - 686

The 4425-686 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4425 caliber with 23j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-b2b8f9bc0167]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

23j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1977

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