Seiko Cal. 6378 - 441

The Seiko 6378-441 represents an important milestone in Seiko's 1967 lineup. It features a Black dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-4ec9f3679430]

Also known as: Tuna, Arnie

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1967

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