That rifle was in the Nov./Dec. 2012 Rock Island Auction catalog. It is listed by serial number, and shows the presentation plate. The presentation plate is a silver plate inletted between the pistol grip and sling swivel. It is engraved:
THE / NATIONAL GUARD TROPHY / WON BY / 1st Sgt. H. E. RILEY D.C.N.G. / PRESIDENT'S MATCH / 1927
It sold for $1725 with the buyer's premium, so someone got a bargain.