Seiko Cal. 6646 - 491

This Hand-Winding model from 1997 features a 37mm PVD Black case. It features a Green dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-8403c22178c1]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1997

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