Seiko Cal. 4558 - 640

The 4558-640 is a sought-after Solar piece from Seiko's golden era. Powered by the 4558 caliber with 36j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-58c80c266091]

Also known as: UFO, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1979

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