The timing test on my Chronometre Bleu was concluded this morning at 4:27, EST. The last 3 hours and 57 minutes went unobserved by me as I stopped trying to emulate my great friend Vlad. 

The results: the CB ran for 66 hours and 17 minutes. I observed the watch for 62 hours and 20 minutes. During that time it didn’t gain more than 2 seconds. Results which are consistent with those I obtained with the CS. Makes sense.