Seiko Cal. 6657 - 157

Released in 1981, the Cal. 6657 with design code 157 was part of Seiko's domestic market collection. It features a Black dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-8b72abec04ee]

Also known as: Crown, Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1981

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