Seiko Cal. 6644 - 767

Seiko 6644-767

The 6644-767 is a sought-after Hand-Winding piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-39fd41fa4959]

Also known as: Sumo, Goldfeather

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
44mm
Case Thickness
12.8mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
White
Jewels
23j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1979

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