Seiko Cal. 4521 - 891

The 4521-891 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-81615139a126]

Also known as: Sumo, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1966

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