Seiko Cal. 6643 - 535

Seiko 6643-535

The 6643-535 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6643 caliber with 19j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-f842d0702dd0]

Also known as: Silverwave

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
42mm
Case Thickness
9.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Burgundy
Jewels
19j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1985

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