Seiko Cal. 6630 - 531

The Seiko 6630-531 represents an important milestone in Seiko's 1966 lineup. It features a Green dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-e16e2555dda4]

Also known as: Sea Horse, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1966

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