Seiko Cal. 6640 - 758

The Seiko 6640-758 represents an important milestone in Seiko's 1992 lineup. It features a Cream dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-de6034b71ee4]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1992

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