Seiko Cal. 6663 - 739

Seiko 6663-739

Released in 1973, the Cal. 6663 with design code 739 was part of Seiko's domestic market collection. Powered by the 6663 caliber with 22j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-71f1e28955c7]

Also known as: Tuna, UFO

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
36mm
Case Thickness
9.2mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Navy
Jewels
22j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1973

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