Seiko Cal. 4487 - 257

This Spring Drive model from 1974 features a 41mm Two-Tone case. Powered by the 4487 caliber with 18j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-71fbf1056aea]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1974

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