Seiko Cal. 6648 - 521

Seiko 6648-521

Released in 1991, the Cal. 6648 with design code 521 was part of Seiko's domestic market collection. Powered by the 6648 caliber with 22j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-3c8a73baf92f]

Also known as: Tuna, UFO

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
39mm
Case Thickness
9.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Black
Jewels
22j
Frequency
36,000 bph
Power Reserve
47 hours
Year
1991

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