Seiko Cal. 6387 - 421

The Seiko 6387-421 represents an important milestone in Seiko's 1970 lineup. With its 18mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-43897e4481aa]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1970

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