Falcon MA mortise lock levers are typically designed so that the rose or escutcheon can be slipped on over the lever and spring cage and then secured in place.
However, the Latitude (LAT) and Longitude (LON) lever designs do not permit the rose or escutcheon to fit over them. These two levers are equipped with set screws so that the lever can be separated from the spring cage portion of the assembly.
See the following snip from the Falcon MA installation instructions illustrating this process.
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