"If you're interested in discussing new developments in the Timex Sinclair world, come to the yahoo..."
The T/S2068 is the American version of the Spectrum. Has an additional 8K extension ROM, cartridge port, two joystick ports and AY-3-8912 sound chip with extra Sinclair BASIC commands to support these devices (STICK, SOUND). Packaged in a hard plastic silver case with nonstandard plastic keys.
The TS2068 is Timex's re-engineered 48K Spectrum. It was released in Fall 1983 just before Timex Computer Corp folded in Spring 1984. A rogue arm of Timex in Portugal continued to sell TC2068s (same as TS2068) and TC2048s (an improved Spectrum - more on this in a sec) until 1989. They, of course, were only allowed to sell in non-Sinclair controlled marketplaces.
Timex recognized that a 48K Spectrum would not continue being competitive in North America for long without changes being made. They developed two computers that were to be North America's debut of the Spectrum. One was called the TS2048 and the other the TS2068. The TS2048 was basically a 48K Spectrum w/ Kempston joystick and the advanced video modes of the TS2068 (see below). The TS2068 was a completely different computer with the Spectrum as its roots. Timex decided to only sell the TS2068. When sales over Christmas 1983 were disappointing, they pulled the plug. Timex of Portugal, no doubt encouraged by the Spectrum's popularity in Europe, continued to sell the TS2068 and the TS2048 (a 16k version of the TS2068) and offered a Spectrum clone as the TC2048 in parts of Europe, notably Portugal and Poland (got this info from two fellows from each of those countries who mentioned that the Timex computers were very popular there).
The TS2048 was a 16K version of TS2068 and TC2048 is a Spectrum clone. When Timex pulled the plug, they dumped all their surplus TS2068s in Argentina. As for the number of TS2068s manufactured, I remember hearing a figure of 60,000 (but I'm not too sure). I have no idea about how many were sold by Timex of Portugal in Europe.
Excerpted from "The Sinclair Computer Hardware Factsheet" by Bob.Johnson @ pdsig.com

