MCM Art Deco Cast Diamond Copper Plated Bookends SB4 August 12, 2023 admin MCM Art Deco Cast Diamond Copper Plated Bookends. 5 3/8″ x 4 1/2″ x 2 3/8. These are rare and unique. Each bookend is solid with no screws or attachments. Machined and worked substantially. Thank you for looking.