Seiko Cal. 6397 - 844

The 6397-844 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6397 caliber with 33j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-f532e691bd63]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1966

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