Seiko Cal. 4521 - 823

The 4521-823 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4521 caliber with 17j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-7098d33aba25]

Also known as: Monster, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1970

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