Seiko Cal. 6630 - 683

This Spring Drive model from 1991 features a 40mm Two-Tone case. With its 22mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-9d0e03b322b9]

Also known as: Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1991

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