Seiko Cal. 6654 - 631

The 6654-631 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6654 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-d658313a52f9]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1978

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