Chocolate trindle pieds look like pure chocolate pieds, since their lower legs are white and brindling cannot be seen.  They have the same pure chocolate coat with no brindling (with maybe just a tiny bit on the cheeks), and they have the same beautiful yellow-gold eyes.  Reyna and Shazam produced a gorgeous chocolate trindle pied in their litter, and you can see Izzy at about the 2:30 mark.