MUGGLEWORTHY

Newt Scamander’s magical suitcase had a brass dial that could be turned to “MUGGLEWORTHY” so the No-Maj customs inspectors would not see the dangerous magical creatures inside. With a turn of the dial, Muggles would only see common objects such as maps, an alarm clock, and a Hufflepuff scarf (WFT).

Scamander's suitcase dial functions like the Barty Crouch Jr's Seven-Lock Trunk. Six locks opened spaces with normal trunk contents such as cloaks or books, while the seventh key unlocked a deep vault where he had kept his hostage, Mad-Eye Moody (GF35).