if you look at the rim and its a Takasago, it will have a manufacture date stamped. Im not sure about DID. That can also help identfy what model bike it the wheel/hub comes from when ever you have a wheel or hub that you think you know what its off but not 100% sure. The date the rim was made can help narrow it down to a couple years, thats of course if you can tell the rim is the original one on the hub and its never been re-laced.