Seiko Cal. 5644 - 174

Released in 1977, the Cal. 5644 with design code 174 was part of Seiko's domestic market collection. Powered by the 5644 caliber with 31j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-1ad1fcd7088f]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1977

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