Antique flip clock up-cycle woodworking project. I found this old antique flip clock at an antique store for $15. I gutted the clock and rebuilt the outer shell out of walnut using a joinery technique called birdsmouth joinery. Birdsmouth joinery takes a special router bit designed for 8 sided pieces (you can also purchase a router bit for 6 sided pieces). Using some glass I had lying around and a glass cutting tool, cut the octagonal shape. Wedged in behind the glass is metallic card stock cut on a Silhouette Cameo die-cutting machine. The glass and the metallic card stock sits in a groove cut into the inside of the walnut. There is also a rabbet cut in the back to hold the rear piece that is held in by hot glue. The gutted clock fits into the shell snuggly by hot gluing pieces of scrap wood on the inside to hold the mechanical unit. The complete clock was finished with a mixture of boiled linseed oil and polyurethane.