Seiko Cal. 5663 - 646

Seiko 5663-646

The 5663-646 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5663 caliber with 22j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-f035ae1dcdbd]

Also known as: Helmet, Golden Tuna

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
46mm
Case Thickness
10.5mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Black
Jewels
22j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1996

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