Silver Sheen Tray Cassie Wood October 01, 2024 15:03 Updated Courtesy of the Bartholomew County Historical Society, Columbus Indiana. Related articles Models 740 to 749: The Cosco Step Stool and Chair, 1940 1969: Cosco Tray Tables Models 140 to 149: The Cosco Set-Up Stool, 1940 Where are Cosco Products Manufactured? Undated: Vent Covers