Nice, vintage, 1980s era, HO scale, Athearn Rio Grande 3156 powered diesel locomotive, appears very lightly used, no wear to note, in wrong box, in the pictures. Box has some wear from storage.  About 7 3/4 inches long.  Very nice shape, no handrails or side trim as shown, little use, no wear to note. Wrong Athearn box. Zoom in for details.