Seiko Cal. 6657 - 799

This Spring Drive model from 1977 features a 41mm Stainless Steel case. It features a Navy dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-150ee71c2d8d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1977

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