Seiko Cal. 4540 - 268

The Seiko 4540-268 represents an important milestone in Seiko's 1978 lineup. Powered by the 4540 caliber with 23j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-729ce4aae7ae]

Also known as: Helmet, Flighty

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

23j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1978

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