Seiko Cal. 4436 - 640

Released in 1976, the Cal. 4436 with design code 640 was part of Seiko's domestic market collection. It features a Cream dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-7e459dd6a64a]

Also known as: UFO, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1976

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