Seiko Cal. 5661 - 699

The 5661-699 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5661 caliber with 19j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-a4530069fff5]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1978

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