This is about the coolest thing I’ve ever stumbled upon. According to Bike Works NYC, this custom chainring was made by a Japanese cyclist. It consists of "Stronglight 49 crankarms with spoked-wheel spider armature, made of thin spokes (1.2mm diameter), with 51- and 45-tooth Simplex chainrings, on a custom Toei bike."
Unfortunately, that’s all the information I can find on it. If you look closely, it’s not just one ring, but a pair that are bolted together. What I can’t tell is, whether both rings share the same spokes (which would mean they couldn’t easily be taken apart), or if they are two entirely separate pieces that are bolted together after they’re laced.
Either way, it’s one of the most unique pieces I’ve ever seen, and I wouldn’t mind trying to build one someday myself. Anyone have a CNC machine I can borrow?