Seiko Cal. 5640 - 660

The Seiko 5640-660 represents an important milestone in Seiko's 1993 lineup. It features a Champagne dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-621db623d0dc]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1993

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