Seiko Cal. 6310 - 521

The Seiko 6310-521 represents an important milestone in Seiko's 1976 lineup. With its 20mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-c0a5ce55d02c]

Also known as: Tuna, Flighty

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Champagne

Jewels

36j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1976

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