Please refrain from purchasing if you are a perfectionist or overly concerned, as this item has been stored at home. I have confirmed its operation before listing, but it may stop after about 10 seconds, or it may run normally for about a day. This is for those who can adjust or repair it. The calendar quick-advance function works correctly. 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. 6106-8420 23 JEWELS