From a performance perspective, the BC01 movement has 100 hours of power reserve, up from the 70 hours of the B01. That is pretty much the only real metric I think Breitling Replica Watches UK has published on the improved performance. However, I believe that I heard them mention a reported 75% increase in performance over time in the BC01 versus the B01.
The movement otherwise continues to operate at 4Hz and includes a 12-hour chronograph, date, and, of course, the time. Through the sapphire crystal caseback of the Breitling Replica Watches Reviews you can see the movement. Clearly, it is different than the stock B01 with all the black parts and some unique elements.
In addition to the BC01 movement, the Breitling Superocean Heritage Chronoworks sports Fake a 46mm-wide case and rotating bezel. Case quality is actually really nice in terms of polishing and overall feel. The dial also has a unique design among other Breitling Superocean Heritage timepieces.
Matched to the 100-meter-water-resistant black ceramic case is a new rubber strap that is meant to resemble the look of Swiss Breitling Replica Watches mesh metal bracelet you can get with other versions of the Breitling Superocean Heritage.