https://cinematography.com/index.php?/forums/topic/78426-fs-original-elmo-scope-lens-holder-bracket-for-16cl/&do=findComment&comment=503983
FS: original Elmo scope lens holder / bracket for 16CL - Cine Marketplace - Cinematography.com
Some people call it scope lens bracket but it is also known as scope lens holder. Originally this is made by Elmo for Elmo 16 CL and Kodak CT1000 projectors....
fs originalcine marketplaceelmoscopelens