Seiko Cal. 6378 - 123

The Seiko 6378-123 represents an important milestone in Seiko's 1965 lineup. With its 22mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-e096048cd9ae]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1965

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