+ Corona 5 version
The model is located at the center of the coordinate system and corresponds to the scale of the real world.
+ neat mesh topology made of quadrangles;
+ light weight and rational number of polygons;
+ high resolution textures;
+ correct location of pivots;
+ competent sweeps;
+ logical names of groups objects textures and materials in Latin;
+ no junk geometry etc.
formats: 3Ds Max 2018 FBX
The number of polygons is shown for one model with two smoothie iterations
references were taken;
https://www.archiproducts.com/ru/%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%82%d1%8b/twils/%d0%  ba%d1%80%d0%be%d0%b2%d0%b0%d1%82%d1%8c-opera_634863#