Seiko Cal. 6687 - 741

The Seiko 6687-741 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-1e1a9b09f2ba]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1965

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