BRIDOL is the British Sundial Society's Register of Fixed and Mass Dials, which gives detail and photographs of about 8000 fixed sundials and 3000 mass dials in the UK.
Some of these are in private gardens, but the majority are publicly available.
This dial is on the north side of the B1046 under an oak tree opposite and just to the east of the car park for the Cambridge Meridian Golf Club.
The dial shows 6am to 6pm with Roman numerals and half hour subdivisions. Noon is obscured by the thick slate gnomon. A.M and P.M. are shown and four is IV.
Above the semi-circular dial is the outline of the UK with the Greenwich meridian as a continuous line from the centre of the gnomon.
The finely carved inscriptions read: "Greenwich Meridian Line" & "This tree was planted 10 Sept 1968 the opening day of the Comberton Meridian School who erected this stone in 1984".