Seiko Cal. 0728 - 501

The Seiko 0728-501 represents an important milestone in Seiko's 1966 lineup. Powered by the 0728 caliber with 34j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-88372f1394b8]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1966

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