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