Seiko Cal. 7187 - 431

The Seiko 7187-431 represents an important milestone in Seiko's 1975 lineup. It features a White dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-b6c94718fc8a]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1975

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