Seiko Cal. 5644 - 611

This Spring Drive model from 1971 features a 44mm Titanium case. Powered by the 5644 caliber with 20j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-004fd25ab699]

Also known as: Sumo, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1971

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