Seiko Cal. 5635 - 545

The 5635-545 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5635 caliber with 27j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-813c70ecedc2]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1980

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