Seiko Cal. 5661 - 180

The 5661-180 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5661 caliber with 26j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-a564be499cb9]

Also known as: Tuna, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1999

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