Seiko Cal. 6644 - 858

Seiko 6644-858

This Hand-Winding model from 1990 features a 39mm Hardlex-Coated Steel case. Powered by the 6644 caliber with 36j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-8530f0b3fa06]

Also known as: Monster, Helmet

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
14.0mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
28,800 bph
Power Reserve
58 hours
Year
1990

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seikata-wm-8530f0b3fa06