Seiko Cal. 6663 - 627

The Seiko 6663-627 represents an important milestone in Seiko's 1977 lineup. It features a Green dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-285c5b16e99a]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1977

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