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