Seiko Cal. 5688 - 503

The Seiko 5688-503 represents an important milestone in Seiko's 1990 lineup. Powered by the 5688 caliber with 19j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-da668d411862]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1990

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