Seiko Cal. 5241 - 640

The Seiko 5241-640 represents an important milestone in Seiko's 1983 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-dce041f6fb9f]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1983

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