Wow ! i really sympathise with you, not 1 but 2 watches.... i guess if a watch is dropped on crystal glass face it is bound to get damaged.
My watch fell flat on itis back from chair height so 2-3ft and landed on its back, i saw it falling and followed with hy eyes HELPLESS.....so first thing i checked was crystal back and as did not see any damage on glass or base thanked my starts and wore it, then noticed the crown protector cracked and side case chipped off.
What amazed me that a shock at back of the watch damage the crown protector, and hwo did the case chip off wheer crown protector is attached, something to think about that may be crown protector attachment to case not adequate.
Any how as they say shit happens and now i just hope PANERAI will fix it, i am waiting to hear from AD and Panerai loacl office lets see.