Gran Hotel (1944)

After failing as a waiter, Cantinflas gets a job as a bellboy in a fancy hotel, by recommendation of his girlfriend. He has to deal with posh people and even with the nobility. One day, an expensive and rare collar, property of a noblewoman, disappear, and Cantinflas is the only one who knows where it is. But Cantinflas gets amnesia caused by a big bunch in his head. Will he tell us the real location of the relic?