it has 5 cogs, and i can't locate any markings on the wheel or any of the sprockets, i cleaned it up slightly with an SOS pad hoping to find some sort of an identification stamp or marking, bike store down the street from my house thought it appeared to be from an old twinn tandem pre 1942, I have a problem with throwing away parts that I think someone out there could use so i would like to find out what it fits in an attempt to find some poor soul that has been searching for one of these, lol