Seiko Cal. 6644 - 398

Seiko 6644-398

The 6644-398 is a sought-after Kinetic piece from Seiko's golden era. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-8e918a10ed6f]

Also known as: Shogun, Helmet

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
37mm
Case Thickness
14.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Navy
Jewels
32j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1981

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