Seiko Cal. 6388 - 612

The Seiko 6388-612 represents an important milestone in Seiko's 1990 lineup. Powered by the 6388 caliber with 25j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-ede8845d27e8]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1990

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