First I have heard of this. It never occurred to me that Custer's Guidon survived the Little Big Horn,

http://www.luxist.com/2010/06/25/custers-last-flag-could-fetch-5-million/?icid=main|htmlws-main-w|dl9|link5|http%3A%2F%2Fwww.luxist.com%2F2010%2F06%2F25%2Fcusters-last-flag-could-fetch-5-million%2F

Boz