I can't really tell what kind of leather that is from the pic, lol. Not close enough to see the grain. Looks more like a washed lamb to me, but there are calf skins that look and feel like lamb too.
I need to take a better picture, but here is my one and only leather excuse the crappy edit, poor resolution, limited time, etc. background was too distracting to be left alone
I believe that zam barrett jacket is calf, although it may be goat. Either way, it has been washed and dyed by hand for an amazing texture. The best part of the jacket is actually the back, which forms to the body so so well.