Seiko Cal. 6681 - 637

The 6681-637 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-5eb4ffead048]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

25j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1979

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