Seiko Cal. 6312 - 390

The Seiko 6312-390 represents an important milestone in Seiko's 1981 lineup. Powered by the 6312 caliber with 28j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-934683960a5d]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1981

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