A unique private collection of more than 50 tractors and related farming and transport memorabilia goes on show to the general public for just one day on July 4 to raise money for charity. The remarkable collection at Lower Park farm at Coldridge, near C

A unique private collection of more than 50 tractors and related farming and transport memorabilia goes on show to the general public for just one day on July 4 to raise money for charity.The remarkable collection at Lower Park farm at Coldridge, near Crediton, has been assembled by building contractor Michael Thorne over a 25-year period. He has been holding his charity day for the last 18 years for a variety of good causes, including the Devon Air Ambulance, the Children's Hospice, Greenpeace and the Eve Appeal. North Devon Hospice is again the chosen charity for the 2009 show, having received more than £4,000 from last year's event.More than 1,000 people, some with their own prized tractors, are expected to attend the open day to see tractors dating back to 1936, including unique prototypes and even two Porsche models. The collection has also benefited this year with the recent arrival of five new tractors from Massey Ferguson's own collection in Coventry and two rare MF conversions made by Four Wheel Traction. Specialist tractors include one with half-track fittings similar to the type that Sir Edmond Hilary took to the South Pole in the 1950s and another which was manufactured to be sufficiently narrow to negotiate between berry bushes in the berry fields of Scotland.Visitors are welcome to visit the collection at Lower Park Farm which will be signposted from the village of Coldridge between Crediton and Winkleigh from 11am on Saturday, July 4. Entrance is £3 for adults and £1.50 for children and there will be a range of quality refreshments available on the day.