Seiko Cal. 6657 - 442

The Seiko 6657-442 represents an important milestone in Seiko's 1980 lineup. It features a Cream dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-1d3322c6afa3]

Also known as: Monster, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Cream

Jewels

34j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1980

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