Seiko Cal. 5657 - 778

The 5657-778 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5657 caliber with 18j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-c231836be336]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1985

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