Seiko Cal. 0728 - 721

Released in 1975, the Cal. 0728 with design code 721 was part of Seiko's domestic market collection. Powered by the 0728 caliber with 19j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-b27cdd3ca66d]

Also known as: Samurai, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1975

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