Seiko Cal. 6643 - 350

Seiko 6643-350

The 6643-350 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6643 caliber with 26j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-1802ed7c0e31]

Also known as: Monster, World Timer

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
36mm
Case Thickness
15.3mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Silver
Jewels
26j
Frequency
28,800 bph
Power Reserve
70 hours
Year
1996

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seikata-wm-1802ed7c0e31