The 6138-001x Yachtsman has the orange blocks on the 12 hr register simply for a 30 minute guide, (when 30 minutes has elapsed the hand will be at the edge for reference, when the hour has elapsed the hand is on the line & dot)
The minute sub dial would be too confusing if it had them so it has the small boxes for elapsed time after 30 minutes.
Some of the later 6138-001x models had yellow boxes.
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The minute sub dial would be too confusing if it had them so it has the small boxes for elapsed time after 30 minutes.
Some of the later 6138-001x models had yellow boxes.
