Corona version 9
The model uses materials that may not be displayed correctly in very old versions of the engine.

Decorative panel ARC
Fastening on cables
5 gradient options
Reference in the interior: https://ru.pinterest.com/pin/451415562664426080/ 

Objects are partially attached textures and materials have logical names
Texturing UnwrapUVW

For Corona render it is recommended to install a version not lower than 1.5 since the glossiness of materials is configured with PBR in mind