Seiko Cal. 4520 - 154

The 4520-154 is a sought-after Solar piece from Seiko's golden era. Powered by the 4520 caliber with 31j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-7ffddeae0e9e]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1994

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