Seiko Cal. 5664 - 633

The 5664-633 is a sought-after Automatic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-99a165da1dce]

Also known as: Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1981

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