Recently picked up this oddball bike, it's definitely the first I've seen. It's a 26x1.75 tire bike but with the right fenders could easily be converted to a balloon tire bike which I might do if I can find some similar patina fenders. Really weird bottom bracket, hinged and held together with two carriage bolts. I've seen some girl's bikes of this make and a few 1960s style men's but I've yet to see another with this tank.