Seiko Cal. 6646 - 640

Released in 1996, the Cal. 6646 with design code 640 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-ad0790cd144c]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1996

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