Seiko Cal. 5641 - 320

The 5641-320 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5641 caliber with 33j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-c73cc434cd8b]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1980

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