This cool self-locking watch display case costs around $55, but you need a 3D printer

Smackmax’s Watch Caddy Case Display is a crowdfunded, 3D-printable three-watch case that uses interlocking parts and hair ties to secure watches without screws, hinges or springs. Digital files start at $35, with filament adding roughly $20 per case.

Preview courtesy of Notebookcheck. The full article opens on their site.