I am participating in the DX Marathon (formerly the CQ DX Marathon) for 2025. I would greatly appreciate your QSO for this event! 

That's the reason I may be "duping" you, since the counter resets each year. I am keeping my records current, sometimes updating several times a day, on two computers (for two stations) so I will not intentionally dupe you again in 2025, apart from contests. 73 es TU, - Mark