I just purchased this watch yesterday and today I noticed that my stem to start the chrono has either a lubrication stain or a scratch. I am not sure what it is and whether or not it should be a cause for concern. I have attached pictures and highlighted the area. The one picture with no highlights is with the stem pressed down, you see the little mark disappears. any help would be appreciated!
also i apologize for any incorrect nomenclature. I am still new to mechanical watches