Seiko Cal. 6371 - 531

The Seiko 6371-531 represents an important milestone in Seiko's 1968 lineup. Powered by the 6371 caliber with 23j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-4e1ff186970d]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1968

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