Seiko Cal. 7172 - 658

The Seiko 7172-658 represents an important milestone in Seiko's 1970 lineup. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-1d28af3ba519]

Also known as: Monster, Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1970

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