This is "Collaboration", a parlor kaleidoscope by Henry Bergeson and Corki Weeks that has recently been completey refurbished by Henry. The body of this scope and the base are of solid Maple with gold-toned metal accents. This scope is self-lit and runs on 3 C batteries. This scope has a 2-mirror system and a fluid-filled object cell that is turned by using the brass wheel on the side of the scope. This piece measures 20"L x 17-1/2"T x 5-1/2"W. It is signed (Corki & Henry T Bergeson), dated (Dec. '91), numbered (10/20) and noted "Refurbished 3/2020 HTB".