Seiko Cal. 4420 - 536

The Seiko 4420-536 represents an important milestone in Seiko's 1978 lineup. Powered by the 4420 caliber with 34j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-c398a476ac4c]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

39mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1978

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