Seiko Cal. 4421 - 745

The Seiko 4421-745 represents an important milestone in Seiko's 1967 lineup. Powered by the 4421 caliber with 24j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-61cfeac96e77]

Also known as: Shogun, Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1967

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