Seiko Cal. 6639 - 455

The 6639-455 is a sought-after Spring Drive piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-c96adeddbc1d]

Also known as: Tuna, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1977

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