Seiko Cal. 6378 - 399

The Seiko 6378-399 represents an important milestone in Seiko's 1965 lineup. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-be37885b739d]

Also known as: Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1965

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