Seiko Cal. 5640 - 630

The 5640-630 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-09bef79e9736]

Also known as: Tuna, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1995

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