Seiko Cal. 5640 - 542

This Hand-Winding model from 1971 features a 41mm Gold-Plated case. It features a Navy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-99e687cded59]

Also known as: Turtle, Arnie

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1971

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