From a press release issued by Team Obsolete:

Re-emergence of “Lost” AJS 7R3 “Triple Knocker”

Cadwell Park – Beezumph Rallye
July 11-12, 2003

Team Obsolete and the National Motorcycle Museum, UK, are pleased to announce the debut of the “lost” 1952 AJS 7R3. There were four of these machines built for the 1952 AJS Works Team. They were a threat from their very first appearance.

For the 1954 season works team manager Jack Williams revamped the machines, with lower frames and pannier fuel tanks. In the process the earlier machines were dismantled. After a twelve-year search Team Obsolete has found most of the essential original parts and restored one machine to running condition for the National Motorcycle Museum. Cadwell Park will be its debut.

The National Motorcycle Museum’s 1954 Pannier tank model will also run at Cadwell Park, thus marking the first time that two 7R3’s have appeared together since 1954.

The Museum’s 1954 E95 Porcupine may make a lap or two if it can be readied in time.