Type CACI-3 Printo-Maxigraph Summator made by Landis & Gyr Ltd
meter
Type RE Printometer made by Associated Electrical Industries Ltd
Landis & Gyr Maxiprint printometer
Landis & Gyr Ltd FF1 wire unbalanced load meter
Type NF3 Megawatthour Meter made by Associated Electrical Industries Ltd
kilowatt-hour electricity supply meter
circa 1904
Chamberlain & Hookham DC Ampherehour Meter
Dual-rate electricity supply meter
Direct current
AC electric meter
circa 1930
DC electricity meter
circa 1900
Type PR Mk II Electronic Summator made by Ferranti Ltd
