The previews are rendered in Corona Render 12. The model uses Corona Legacy Mtl. A version of Corona Render not lower than 1.5 is required.
Material conversion to V-Ray was done using the standard V-Ray scene converter. The V-Ray version is 6.2.

Retro coffee machine inspired by DEMIAND RETRO (logo is missing, proportions and small details do not match the original)
The back of the coffee machine is modeled simply.

For one coffee machine
Poly: 258,811
Verts: 260,177

For the entire model (black and white coffee machines)
Poly: 517,622
Verts: 520,354

Those working in V-Ray versions lower than 3.1 should be careful; in the materials section, BRDF is set to Microfaset GTR (GGX). If your version is older than 3.1, the BRDF field will be empty. Choose Blinn, Phong, or Ward – whichever is preferable for you.

For Corona Render, it is recommended to use a version not lower than 1.5, as the glossiness of the materials is configured with PBR in mind.