Sinclair ZX Spectrum +3

Brand: Amstrad Consumer Electronics Plc.
Model: ZX Spectrum +3
Country of origin: United Kingdom
Made in: Taiwan (also China)
First year of production: 1987

Dimensions: 439 × 174 × 50 mm (feet adds 2 mm)
Weight: 1630 g

Rom: available here (v 4.0) and here (v 4.1)

Cost effective redesign. Also it could page out its ROM to make it CP/M Plus compatible, unlike any previous Spectrums.