Seiko Cal. 4445 - 643

The Seiko 4445-643 represents an important milestone in Seiko's 1965 lineup. Powered by the 4445 caliber with 34j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-9010dc29f19e]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1965

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