Seiko Cal. 5635 - 540

Released in 1965, the Cal. 5635 with design code 540 was part of Seiko's domestic market collection. Powered by the 5635 caliber with 20j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-a1e5e051c496]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1965

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