Seiko Cal. 6644 - 757

The 6644-757 is a sought-after Solar piece from Seiko's golden era. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-f52fb80768ea]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1969

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