Seiko Cal. 6643 - 550

Seiko 6643-550

The Seiko 6643-550 represents an important milestone in Seiko's 1986 lineup. Powered by the 6643 caliber with 36j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-6f52f7bbd055]

Also known as: UFO, Silverwave

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
36mm
Case Thickness
14.7mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
51 hours
Year
1986

Related Models

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