Seiko Cal. 5633 - 730

The Seiko 5633-730 represents an important milestone in Seiko's 1975 lineup. It features a Navy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-f9dace698c28]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1975

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