Seiko Cal. 5263 - 439

The Seiko 5263-439 represents an important milestone in Seiko's 1978 lineup. Powered by the 5263 caliber with 26j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-b3baa5986f23]

Also known as: Tuna, UFO

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1978

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