Seiko Cal. 7138 - 580

The 7138-580 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7138 caliber with 29j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-60933f1bc442]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1976

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