He invented everything that is wonderful in the world. Teddy bears, and chocolate bars, and… oh, and something even more remarkable than that. A glass heart. Put simply, it’s a power source. But it’s capable of many wondrous things. (2×19, “Brown Betty”)
Back on Valentine’s Day I opted to do Agent Loeb’s parasite-ridden heart instead. So, before I run out of time, here is Walter’s glass heart. As with the Machine, there seem to be a couple of pieces of concept art from the show (as in September’s Notebook) which do not quite match the prop that was actually created. This isn’t a faithful version either, but just my take on it.