Seiko Cal. 6657 - 341

The Seiko 6657-341 represents an important milestone in Seiko's 1977 lineup. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-924568dc6241]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1977

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