1/ First Day Cover for 25th Anniversary of monitoring radio signals from artificial Earth satellites at KGS and letters (16th May 1985)

2/ Kettering Group Logo Pen invoice

3/ First Day Cover: Kettering Boys School Satellite Tracking Group Soyuz 25: Data re telemetry and voice and GEP’s and JD Slaters signatures (original)

4/ GE Perry's letter re re-naming of the group to The Kettering Group

5/ Kettering Group logo colour illustration

6/ Wonderstuff CD and cover (which featured GE Perry and JD Slater and and pupils in 1960s)