Graham Construction & Engineering Inc Belt Buckle.  Not sure the date on this one, possibly vintage.  Features the company logo as well as various construction workers (welder, painter, carpenter, iron worker, and a backhoe.  Has a bronze tone finish.  Buckle measures approx. 3-5/8" x 2-1/4" x 1/8" thick.  It's used and is in good condition with light signs of use/wear including a few small subtle spots of verdigris (or similar), nothing serious.  Please see photos for more details.