Seiko Cal. 4546 - 977

The Seiko 4546-977 represents an important milestone in Seiko's 1971 lineup. Powered by the 4546 caliber with 17j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-aafd2e250990]

Also known as: Bullhead, UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1971

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