Seiko Cal. 4521 - 523

The Seiko 4521-523 represents an important milestone in Seiko's 1970 lineup. It features a Champagne dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-051cafedcdec]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

19j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1970

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