Sinclair ZX Spectrum+
The first successor to the well-known ZX Spectrum. This 48 KB Spectrum (development codename TB) introduced a new QL-style housing with plastic keys and a reset button that was basically a switch that shorted out the CPU reset capacitor.
Electronically, the Sinclair ZX Spectrum+ was identical to the previous ZX Spectrum 48 KB model. It is therefore possible to switch the mainboards between the original housing and the Spectrum+ housing.