Seiko Cal. 5644 - 748

The 5644-748 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-d75f07c1eecd]

Also known as: Sumo, Panda

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1974

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