| Clue | Source | Date |
|---|---|---|
| Security clip-ons | Thomas Joseph | 20 Apr 2022 |
| Employees' clip-ons | Premier Sunday | 10 Nov 2019 |
| Business cards? | Universal | 22 Mar 2019 |
| Business cards? | ||
| Pin-ons worn by staffers | Premier Sunday | 15 May 2016 |
| Officers' clip-ons | New York Times | 13 Mar 2015 |
| Officers' clip-ons | ||
| Items that can open doors | ||
| Items that can open doors | ||
| Shoulder bag attachments | ||
| Employee pin-ons |