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 south transept. The upper part is taken up by an inscription telling us that it was restored in memory of a churchwarden. What could have been in this space before the restoration? The dial declines West and has a thick square section gnomon which demands a compensating gap along the line of the substyle. There is gap but it is at noon. Burge discusses the possible reasons for this in an appendix to his book on Cornish church sundials. The last date on the dial looks like 1802 which would make the churchwarden some sort of time traveller. The ’0’ is probably a poorly engraved ’9’.