Seiko Cal. 4520 - 237

The Seiko 4520-237 represents an important milestone in Seiko's 1973 lineup. Powered by the 4520 caliber with 32j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-ccb4682d6d39]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1973

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