Seiko Cal. 6388 - 646

The Seiko 6388-646 represents an important milestone in Seiko's 1986 lineup. Powered by the 6388 caliber with 28j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-f72ef9143f46]

Also known as: Tuna, Bellmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1986

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