It is running, but I don't know the details of the time difference or other fine operations. Please consider it as is. No returns will be accepted to prevent swapping. Please understand the 3N rule (no complaints, no returns, no exchanges). SEIKO KS HI-BEAT wristwatch with automatic winding function, stainless steel case, and date display. - Brand: SEIKO - Model: KS HI-BEAT - Function: Automatic winding - Date display: Yes - Case material: Stainless steel - Case shape: Round Thank you for viewing.