Seiko Cal. 4445 - 421

Released in 1972, the Cal. 4445 with design code 421 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-db8dd4f6c22a]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1972

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