Seiko Cal. 6687 - 540

The Seiko 6687-540 represents an important milestone in Seiko's 1980 lineup. It features a White dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-969ddc3dc3a4]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1980

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