Seiko Cal. 5657 - 923

Released in 1984, the Cal. 5657 with design code 923 was part of Seiko's domestic market collection. With its 19mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-7eb9ec74083b]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1984

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