The Ronda 1243-21 is a manual-winding chronograph movement. It features a 60-second chronograph with 15/30-minute and 12-hour registers, plus a sub-second dial. The pillar wheel mechanism and Breguet hairspring are distinctive technical features. It powered Breitling's Avi and Copilot models in the 1950s and is now discontinued.
Last updated 8 Jul 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Display Type
Analog
Winding
Manual
COMPLICATIONS
Chronograph30-Minute Counter12-Hour Counter
FEATURES
Small Seconds
QUICK FACTS
FOR WATCH DEALERS
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