Pair of cast iron and brass tracks from the 19th century

Pair of cast iron tracks and polished brass ball, they are from the 19th century, the small collar is slightly chiseled, then note a small hole in the cast iron which in no way hinders the use of these tracks.  They are with a slightly decorated round base and flutes, 
Dimensions width 9 cm height 19.5 cm depth 32.5 cm