Seiko Cal. 6658 - 745

The Seiko 6658-745 represents an important milestone in Seiko's 1975 lineup. Powered by the 6658 caliber with 27j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-0f220ef9dab0]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1975

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