Seiko Cal. 6397 - 820

The Seiko 6397-820 represents an important milestone in Seiko's 1976 lineup. Powered by the 6397 caliber with 33j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-a1f18a0d3309]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1976

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