Seiko Cal. 6643 - 724

This Automatic model from 1965 features a 39mm Titanium case. Powered by the 6643 caliber with 36j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-20108967b932]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1965

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