Seiko Cal. 4540 - 446

The Seiko 4540-446 represents an important milestone in Seiko's 1970 lineup. Powered by the 4540 caliber with 22j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-96e20db1a2fb]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

35mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1970

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