Seiko Cal. 5657 - 910

The 5657-910 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5657 caliber with 24j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-0d2813423595]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1968

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