Seiko Cal. 6643 - 463

Seiko 6643-463

The 6643-463 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6643 caliber with 30j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-9d3a105a158b]

Also known as: Navigator

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
45mm
Case Thickness
12.5mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
50m
Dial Color
Silver
Jewels
30j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1968

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seikata-wm-9d3a105a158b