First off, if you haven't seen Andrew Thomas's link to this website's news section, please click here for the news.
The "regular" steel chrono is 44mm in diameter and with a water resistance of 30 bar (about 300 meters). It uses an ETA 7750 base, modified to IWC specifications, and is Calibre 79320. It comes with a silver dial or black, with bracelet or rubber strap. Here's a wrist shot:
Now --for some of the special watches that are already announced, the bronze chrono "Expedition Charles Darwin" has attracted much interest. It is not limited in theory, but production will be limited especially in 2014. It likewise is 44mm and 30 bar wr, but used the in-house calibre 89365. We aren't supposed to mention prices here, but I will say it's more expensive than the "old" Deep 2 (more on that later). It will be very hard to get due to supply and demand, so get in line if you really want one.
I really like the new chrono Edition "Galapagos Islands", which also uses the calibre 89365. It also is not limited but initial production won't be huge --so again get it line. A wrist shot is shown here:
The bottom line is that all the chronos are 44mm in diameter, all have 30 bar water resistance, and the movement varies from calibre 79320 (in steel) to 89365 (in models with special case materials). There also will be several other special models --more on that in due course.