ETON Park Bowls Club has raised £500 from the Kevin McGuinness Memorial Trophy in aid of the Midlands Air Ambulance.
An unnamed donor added £182 from his own pocket to the £318 raised on the day.
Organiser Terry Whyman said: "I'm not surprised by the gift from the person in question, having known him for several decades.
"I'm sure the charity will be very grateful. We were also fortunate with the raffle prizes donated by local businesses. In the last three years, the competition has raised more than £1,000."