A security apparatus is disclosed herein for securing a secured object to a tabletop of a display table or to another display surface. The security apparatus comprises a housing with a support surface for supporting the secured object. A pair of arm assemblies extend above the support surface and are configured to move between an open position where the secured object may be placed on or removed from the support surface. A mechanical drivetrain is provided for actuating the arm assemblies between the open and closed positions. When the security apparatus is attached to a tabletop of a display table, at least a portion of an actuator of the mechanical drivetrain will extend beneath the surface of the display table, which should be made inaccessible to the public.