Seiko Cal. 6678 - 321

The Seiko 6678-321 represents an important milestone in Seiko's 1967 lineup. It features a Green dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-f97a8075495e]

Also known as: Monster, Navigator

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1967

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