Seiko Cal. 5243 - 730

The Seiko 5243-730 represents an important milestone in Seiko's 1970 lineup. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-7514a5ef153f]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1970

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