Message text written by "Ian Trackman"
>Underneath the ring is scratched SP 640036< Not sure I can help but SP 640036 is the UK Ordnance Survey Reference for a point in the UK at N51deg 44min W01deg 04min. This refers to a place about 6 miles to the East South East of Oxford between Great Haseley and Tiddington - just where the M40 Motorway passes between the two.
