Seiko Cal. 7187 - 528

This Automatic model from 1974 features a 40mm Two-Tone case. Powered by the 7187 caliber with 31j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-602b83b72da1]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1974

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