Seiko Cal. 5633 - 978

The Seiko 5633-978 represents an important milestone in Seiko's 1965 lineup. It features a Black dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-ad8927d4b86f]

Also known as: Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1965

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