Did Heuer/Breitling/Hamilton use each others signed Cal 11s?

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Did Heuer/Breitling/Hamilton use each others signed Cal 11s?

I'm looking at purchasing a vintage Breitling Chrono-matic from the early '70s. The watch has a Hamilton-signed caliber 11 movement. I know that the caliber 11 was a joint venture for Breitling, Heuer, and Hamilton, but did they use each others signed movements in their watches?

Thanks,
Kevin

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Did Heuer/Breitling/Hamilton use each others signed Cal 11s?

No -- Each Brand's Movements Should Be Signed by the Brand

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