Seiko Cal. 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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