Seiko Cal. 6370 - 878

The Seiko 6370-878 represents an important milestone in Seiko's 1966 lineup. With its 20mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-9db287be11ae]

Also known as: Tuna, Rally

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1966

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