Seiko Cal. 5656 - 840

This Hand-Winding model from 1966 features a 46mm Hardlex-Coated Steel case. It features a Black dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-d1019f2bfaf6]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1966

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