Seiko Cal. 6648 - 763

The 6648-763 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6648 caliber with 33j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-fb0cb06bac23]

Also known as: Monster, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1983

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