Seiko Cal. 6657 - 628

This Hand-Winding model from 1994 features a 41mm Two-Tone case. It features a Green dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-d87532d31b75]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1994

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