Seiko Cal. 4527 - 640

The Seiko 4527-640 represents an important milestone in Seiko's 1972 lineup. It features a Champagne dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-5236f170ac2a]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

35j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1972

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