Seiko Cal. 0728 - 686

This Spring Drive model from 1977 features a 46mm Two-Tone case. Powered by the 0728 caliber with 30j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-e4a2ca4ed751]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1977

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