Seiko Cal. 5656 - 171

The 5656-171 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5656 caliber with 28j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-91beceb6169d]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1979

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