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.
Prism with 20 triangular faces, 10 on central band have cup hollows. Upper and lower sloping sections flat. Dials on all available surfaces. Originally from Invermay. Perthshire.
Ref: A R Somerville, Proc Soc Antiq Scot, 117, 1987, "The Ancient Sundials of Scotland".
