Seiko Cal. 5231 - 664

The 5231-664 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5231 caliber with 20j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-377fd49ab82b]

Also known as: Tuna, World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1980

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