Yes,what you have is the complete tongue,and the proper wreath that is missing its belt loop.This particular buckle is what us collectors refer to as the Rope Border Eagle and its one of the more common of the stamped brass buckles.The vast majority of these do seem to be dug out West as they were produced for the civilian Trade duing the mid-1850's.Great piece! CC Hunter is the true expert on these perhaps he will chime in as well!Could you possibly PM me where in Nor Cal you are?