Seiko Cal. 6644 - 528

Seiko 6644-528

The Seiko 6644-528 represents an important milestone in Seiko's 1977 lineup. Powered by the 6644 caliber with 35j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-bba5b405a4ba]

Also known as: Navigator, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
8.7mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
60m
Dial Color
Cream
Jewels
35j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1977

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