Around 1934 the General Electric Company (GEC ) took over the whole of the manufacture and sale of domestic telephones of the Sterling Telephone and Electric Co. Ltd.
Certain products formerly listed by the Sterling company were still produced and listed in the GEC Everything Electrical Catalogue.
Sterling - GEC conversion table
The original Sterling "U" code was then transferred to the GEC "K" code.
The following table is a conversion from the U code to the K code (1935 list).
| Sterling Code Number | GEC Code Number |
| U61 | K7730 |
| U66 | K7740 |
| U71 | K7741 |
| U75 | K7735 |
| U95 | K7766 |
| U105 | K7790 |
| U115 | K7746 |
| U125 | K7750 |
| U132 | K7796 |
| U205 | K7820 |
| U292 | K7847 |
| U305 | K7851 |
| U320 | K8005 |
| U410 | K7867 |
| U424 | K7864 |
| U425 | K7863 |
| U427 | K7888 |
| U500 | K7953 |
| U510 | K7967 |
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