Seiko Cal. 6635 - 723

The Seiko 6635-723 represents an important milestone in Seiko's 1987 lineup. With its 19mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-84a78c6d1fdb]

Also known as: Samurai, Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1987

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