Seiko Cal. 7040 - 640

The Seiko 7040-640 represents an important milestone in Seiko's 1985 lineup. With its 21mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-f4f303086c36]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1985

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