Seiko Cal. 6378 - 633

Seiko 6378-633

The Seiko 6378-633 represents an important milestone in Seiko's 1997 lineup. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-f5873f5b81e0]

Also known as: Helmet

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
45mm
Case Thickness
9.7mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
40m
Dial Color
White
Jewels
30j
Frequency
21,600 bph
Power Reserve
65 hours
Year
1997

Related Models

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