Seiko Cal. 6387 - 440

The Seiko 6387-440 represents an important milestone in Seiko's 1991 lineup. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-93aa4ed2d125]

Also known as: Tuna, Helmet

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1991

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