Seiko Cal. 4525 - 639

The Seiko 4525-639 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-002e59cae4b5]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1971

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