Seiko Cal. 6657 - 608

The Seiko 6657-608 represents an important milestone in Seiko's 1990 lineup. It features a Navy dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-e9708de89d7c]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1990

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