Seiko Cal. 4520 - 727

The Seiko 4520-727 represents an important milestone in Seiko's 1978 lineup. With its 19mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-176f9386673a]

Also known as: Samurai, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1978

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