Seiko Cal. 6371 - 521

The Seiko 6371-521 represents an important milestone in Seiko's 1985 lineup. With its 20mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-e709b27a8f56]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1985

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