Seiko Cal. 5242 - 391

The Seiko 5242-391 represents an important milestone in Seiko's 1969 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-6ed3dff22c7b]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1969

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