Four World Champion-signed limited edition Silverstone first-day postal covers, the four identical Motorcycle Stamp Issue printed envelopes signed by

Four World Champion-signed limited edition Silverstone first-day postal covers, the four identical Motorcycle Stamp Issue printed envelopes signed by Geoff Duke and numbered 54/100, John Surtees 49/100, Carl Fogarty 47/100 and James Toseland 55/100, each set of six stamps franked with two special Silverstone racing motorcycle marks dated 19th July 2005 (4)