Seiko Cal. 6640 - 627

This Hand-Winding model from 1990 features a 46mm Gold-Plated case. It features a Black dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-a524bd8e8b5e]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1990

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