Seiko Cal. 4534 - 640

Released in 1978, the Cal. 4534 with design code 640 was part of Seiko's domestic market collection. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-212eeb92cfa7]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1978

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