Seiko Cal. 4520 - 630

Released in 1966, the Cal. 4520 with design code 630 was part of Seiko's domestic market collection. It features a Black dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-356c368bfb4d]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1966

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