Seiko Cal. 6645 - 864

Seiko 6645-864

The Seiko 6645-864 represents an important milestone in Seiko's 1979 lineup. Powered by the 6645 caliber with 36j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-6d3c87ef4cdf]

Also known as: Helmet, Rally

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
14.2mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
170m
Dial Color
Silver
Jewels
36j
Frequency
28,800 bph
Power Reserve
63 hours
Year
1979

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