In my experience these are exceedingly uncommon. I have 2 examples which are already uncommon in any metal and would love to see more if you have them. 14k Rose Gold square bumper: 14k Rose Gold Cal. 352 Ref. 2648 Constellation:
I am in... I like 14 K rose gold as its colour is much deeper red than 18K 2369 14K 2570 14K Never seen these indexes before I don´t recall the ref. It is a rare art deco T17 chronometer version with 17J