Seiko Cal. 6630 - 987

The 6630-987 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6630 caliber with 25j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-5ad180a7d55b]

Also known as: Monster, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1987

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