Seiko Cal. 6616 - 646

The Seiko 6616-646 represents an important milestone in Seiko's 1979 lineup. Powered by the 6616 caliber with 24j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-e1ea27e2dae3]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1979

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