Seiko Cal. 6378 - 633

The Seiko 6378-633 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-1517555d9607]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1987

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