My parents old house still has my 'Casa' bell on, which I only put up a year before they moved, but bet you 100% the system is dissed, as it was a Scanny 816 in the house the the (old) 9800 fitted in the garage with 2 sheds on DTs
My first bell with 'my' name on is still up, forgot that, that was actually a gardtec 300 but I moved on to a firm after very few, then worked for MOD, and didn't install my own stuff again until early 2000s
https://goo.gl/maps/pzm1dttZzsq
No. 5, inbetween PRW at No. 4 and DIY tat. at No. 6, shite pic thou. Was called 'FSEC' then as well. Circa 1995/6.