Seiko Cal. 6654 - 523

The 6654-523 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6654 caliber with 27j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-22bab6295df1]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1976

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