Seiko Cal. 5633 - 577

The 5633-577 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5633 caliber with 31j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-2744bc07ca18]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1971

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