Seiko Cal. 6645 - 660

The 6645-660 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Champagne dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-f7fefb055051]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

29j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1993

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