The previews were rendered in Corona Render 12. The model uses Corona Legacy Mtl. A version of Corona Render no lower than 1.5 is required.
Material conversion to V-Ray was performed using the standard V-Ray scene converter. V-Ray version - 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

Poly: 205 699
Verts: 249 518

TurboSmooth is applied to several objects during rendering, and it is enabled (geometry for smoothing). Adjust the smoothing level as needed. The dimensions of the model indicate the overall dimensional container for all objects.

Those working in V-Ray versions lower than 3.1 should be careful, as the materials in the BRDF section use Microfacet 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 no lower than 1.5, as the glossiness of materials is set with PBR in mind.