Seiko Cal. 4443 - 634

Seiko 4443-634

The Seiko 4443-634 represents an important milestone in Seiko's 1978 lineup. Powered by the 4443 caliber with 20j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-a76463b43247]

Also known as: Helmet, Navigator

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
15.2mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Silver
Jewels
20j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1978

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seikata-wm-a76463b43247