I bought this at auction a couple of days ago (museum was liquidating). I would say it is a private purchase version of the M1903 US Army Campaign Hat. The star vents are different from the issue version and it has the type of maker's logo not found in an issue hat. It was made by G.W. Alexander of Reading, Pa. They were in business for a long time (i.e., decades either side of 1900). The cord appears to be dark OD green with gilt flecking. I'm wondering if this is an officer's cord where the black faded to a dark shade of green (I've seen this with the lining of older coats). The 17th Inf Badge, is not something typically associated with officers, but I don't know if officers wore them on these hats. It's unusual in that it is hallmarked with "Patent Applied For." (don't usually see that on these M1895 hat badges - so perhaps it's a very early one.)
So, any thoughts you guys who really know this stuff can provide me on this would be greatly appreciated.