Seiko Cal. 6617 - 728

The Seiko 6617-728 represents an important milestone in Seiko's 1969 lineup. Powered by the 6617 caliber with 24j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-301e5f452189]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1969

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