It’s easy pickings for a thief to reach into an unlocked showcase and conceal a valuable piece while a salesperson has his back turned or isn’t on the showroom floor. Cases must remain locked while not in attendance, or if the salesperson must turn his/her back, or leave the area, even momentarily. The best showcase lock types use a key that’s non-removable until the lock is engaged. When showing a piece, return it to the locked case or take it with you, while temporarily leaving the customer’s presence. Never leave a piece unattended unless you can afford to lose it permanently.