Seiko Cal. 6641 - 428

Seiko 6641-428

The 6641-428 is a sought-after Solar piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-13d91d9f8639]

Also known as: Rally

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
8.4mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
60m
Dial Color
Black
Jewels
25j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1968

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