Seiko Cal. 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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