Seiko Cal. 4564 - 936

The 4564-936 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4564 caliber with 31j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-90ae878c3be2]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1967

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