This is my project breakdown for the 1933 Philips 634A Radio which you can find in this link
https://www.artstation.com/artwork/Dx6dqy
For this in-game resolution model I kept the polygons count as low as possible while still capturing the silhouette of the high-res model. I created the high and low resolution meshes in Maya and baked the normal and occlusion maps in Substance Painter.