Seiko Cal. 4443 - 921

The 4443-921 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4443 caliber with 21j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-7fa3c22a3501]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1977

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