Along a pillar that sits just behind the white armchair in the center of the living room is a strange object that almost looks like an upright xylophone – with strips of metal arranged in a neat column and bolted to a piece of wood. This particular decoration completely confused some fans on Reddit, who debated at length what it could be. “What is that thing on the wall by Leonard?” asked u/Hashtag_Nailed_It. After an initial joke from u/bobaloocookazoo about it being a tool used to measure Leonard’s height, u/Mr_skywalker05 replied, “Idk, I always thought it was a door-to-door. dry erase marker. Other users have suggested that it could be a cassette holder or a busbar from a switchboard.
In the end, u/seriousguy1307 provided the answer by linking to a behind-the-scenes featurette from Season 5, in which set designer Ann Shea reveals it’s actually a vintage fuse holder. “Believe it or not, I get so many emails and letters from people asking me what it is,” Shea admitted. “To me, it was just a cool thing to put on the wall.” While hanging a vintage fuse holder on the wall simply for decoration certainly sounds like something Leonard and Sheldon would do, it’s absolutely hilarious that fans have been confused about this unique decoration for so long – so much so that some actually reached out to the crew themselves just to find out what it might be.