Seiko Cal. 6387 - 721

The Seiko 6387-721 represents an important milestone in Seiko's 1980 lineup. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-74b45cec364b]

Also known as: Samurai

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1980

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