Seiko Cal. 6397 - 538

The 6397-538 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6397 caliber with 32j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-f5aa5ffad47f]

Also known as: Turtle, Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1976

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