CP,
Sorry, but my searching doesn't come up with a diagram or part number for that bezel from 1964 onward. I also have never seen one on an FJ40/45, but it could be correct under a specific application.
Perhaps Mark A. could provide a part number for reference.
Assuming you have the OEM switch for your year vehicle, when this is installed behind the switch, do those black dots line-up exactly for each key position? Lots of electric switches from various manufacturers have come with similar bezels over the years--yours could have been added. Toyota could very well have supplied a bezel with a switch for a non-Land Cruiser, and even not issued a separate part number for it.
In the early eighties, the rheostat headlamp switch had a bezel to indicate dash lamp dimming, and it WAS given a separate part number.
Interesting. If it did come on an FJ40/45, then there would likely be a similar bezel with Japanese characters for the home market.
Marv Spector, "The Encyclopedia," would have had the answer.