VALJOUX 92 CHRONOGRAPH RUNNING 17 JEWELS TO REPAIR. The spots you see on the crystal it’s from the flash. All parts are intended for watchmakers, hobbyist, or repair professionals. Items may require cleaning, adjustment, or servicing. I do not test parts unless noted. We Only Sell New & Used Watch Parts We Are NOT Watch Material SUPPLY HOUSE. If you are looking for watch parts, PLEASE let me know I have many parts NEW & USED for many watches brands. AND IF YOU ARE NOT HAPPY, PLEASE LET ME KNOW BEFORE YOU LEAVE A FEEDBACK. THIS COME FROM A (SMOKE / PETS FREE).