Seiko Cal. 5663 - 555

The 5663-555 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5663 caliber with 26j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-66b0ffcfda97]

Also known as: Helmet, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1981

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