Seiko Cal. 5644 - 250

The 5644-250 is a sought-after Solar piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-392b1db177ee]

Also known as: Sumo, Silverwave

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1974

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