Seiko Cal. 4521 - 402

The 4521-402 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-18989fb0f833]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1988

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