A few sources posted a link to an eBay auction brought to our attention by Alan's CD-i Zone: This is (rumoured to be) a "specially designed and adapted CD-i player for use in a doctor's surgery". According to the seller, it is based on a 450 player, with a top loading and locking mechanism. The description is below:
"This is a very rare version of the Philips CD-i that is as far as I can tell completely undocumented anywhere on the internet so far. I find no search results and no one else seems to have heard about it before aside from one person on www.digitpress.com forums that says he's seen one before. I am the only one that I know of who owns one as of right now.
At first I was a little sceptical if this was really a CD-i player. From the box itself, it's nowhere to be recognized as a CD-i player. But then, the controller port on the back is the exact one, but even more: The power button on the right side is the same power button as on a 450 player (and it's even positioned on the same place). It looks like if the shell is completely made of metal, and probably units like these were used as a kiosk system, allowing to advice people about their health.