I noticed Vignelli’s black and white perpetual calendar (which is currently on my wishlist) in a couple of recent catalog photos. Here it is in a home office from Pottery Barn:
And here, in a photo from DWR:
Obviously they’re trying to sell to their furniture to you (so they’re relying on good photography and styling). Both photos are pleasing, but my eye just goes straight to that calendar. It just makes me want one all the more.
Luckily, it’s a classic and I don’t think it will be disappearing anytime soon. If you’re looking for one, you can find them here or here (and several other places, I’m sure).