Seiko Cal. 4521 - 844

The 4521-844 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4521 caliber with 31j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-d12da492bb51]

Also known as: Monster, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1965

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