Seiko Cal. 5657 - 583

This Automatic model from 1973 features a 41mm Two-Tone case. Powered by the 5657 caliber with 30j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-f5b2fc5b633f]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1973

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