Most McCall fights are great examples of his chin because he seems to care so little about getting hit. :think
MCullogh was amazing chin wise didnt ring magazine have him in the top 10 for the best chin ver afew yerars ago
dempsey around 80 ? pro fights around 100 pre pro fights and 1 loss by ko wich was possibly a dive or just a loss when he was a what 17 year old middleweight to a veteran heavy i saY THATS AN IRON JAW
Rolando Navarette pounding on Bazooka Limon and Limon siling and tapping his own chin! Navarette got discouraged at the abuse Limon could withstand & Limon came back & knocked his man out!
Juan La Porte vs Wilfredo Gomez McCullough vs Zaragoza, already been mentioned, first one I thought of.
Max Baer. The guy would laugh like an idiot while a ranked heavyweight was pounding his chin then get bored and put them on the canvas. His ability to take punishment physicaly and psychologicaly was incredible.