Seiko Cal. 5643 - 740

The Seiko 5643-740 represents an important milestone in Seiko's 1987 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-82da79513a4e]

Also known as: Tuna, Panda

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1987

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