Seiko Cal. 5639 - 523

Released in 1969, the Cal. 5639 with design code 523 was part of Seiko's domestic market collection. It features a Silver dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-2c8ee62ef799]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1969

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