Please refrain from purchasing if you are a perfectionist or overly concerned, as this item has been stored at home. I have confirmed the operation before listing, but I do not offer a guarantee. The calendar quick advance function works normally. Please understand that this is an old mechanical watch. Please examine the images carefully and purchase only if you are satisfied. Returns are not accepted after purchase to prevent swapping. 5206-6250 25 JEWELS Glass replaced New retro belt