Seiko Cal. 5644 - 768

The 5644-768 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-10da5e71f8e4]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1993

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