Seiko Cal. 6639 - 444

This Spring Drive model from 1975 features a 45mm Hardlex-Coated Steel case. It features a Silver dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-6c7d8e97da01]

Also known as: Golden Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1975

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