Seiko Cal. 5644 - 661

The 5644-661 is a sought-after Solar piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-a14ecc6dd317]

Also known as: Sumo, Arnie

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1972

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