Seiko Cal. 6357 - 631

The 6357-631 is a sought-after Solar piece from Seiko's golden era. Powered by the 6357 caliber with 19j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-736a2de6bc02]

Also known as: UFO

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1982

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