Seiko Cal. 5648 - 388

Seiko 5648-388

The Seiko 5648-388 represents an important milestone in Seiko's 1975 lineup. Powered by the 5648 caliber with 20j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-1ce463ab25a7]

Also known as: Baby Tuna, Flighty

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
41mm
Case Thickness
11.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
190m
Dial Color
White
Jewels
20j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1975

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