Seiko Cal. 5640 - 880

The 5640-880 is a sought-after Automatic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-766e70d49faf]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

23j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1980

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