After I got a bit closer, I realized that this was probably a track bike onto which someone had grafted a rear derailleur and turned effectively into a 5 speed. Anyone with more knowledge of such things have any idea? It looks a bit like a grafted solution to me, but I'm not an expert. It didn't have a front derailleur, although it did have double front chainrings (I'm guessing it was cheaper/ easier just to abandon one chainring).
From the spoke card and multiple stickers, I gather that this rider is an avid bike polo fan. I thought that was generally a fixed gear thing. Anyone know if this kind of modification is common?
And Steve A, No, no new camera yet, just iphone photos.