Seiko Cal. 5648 - 779

The 5648-779 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5648 caliber with 23j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-1baa86aa7354]

Also known as: Tuna, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1987

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