Seiko Cal. 6657 - 921

The Seiko 6657-921 represents an important milestone in Seiko's 1982 lineup. With its 21mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-3ee87066e065]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1982

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