Seiko Cal. 6678 - 251

The Seiko 6678-251 represents an important milestone in Seiko's 1967 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-d92fe84ddadc]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1967

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