glace calf...it is the show substitutions from fw07...all these bags went on sale at prada stores...
there is however a bowler shape (almost exact size, not as tall though) from ss07, it is the cervo antik bowler bl0391 and bl0390 in Bianco...although this bag went on sale as well...
for the above actual bag, it was only available in nero and dk brown...
I don't think the large bowler comes in the Ivory color, at least not in the F/W collection. Maybe they'll do it in Ivory for the S/S collection. I've only seen the smaller one in Ivory so far, though.