Seiko Cal. 0728 - 642

The Seiko 0728-642 represents an important milestone in Seiko's 1976 lineup. Powered by the 0728 caliber with 24j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-b054d7b45ecc]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1976

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