Seiko Cal. 6639 - 180

The 6639-180 is a sought-after Automatic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-75a90f523a60]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

35j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1979

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