I thought the Compact cylinders were originally made in France, alongside the Sensotronics?
Perhaps when they moved to the Vogue, Sprint and Galaxy models, they decided to move the older machines' production to Portugal?
The Alpinas were, I believe, made at the Cambuslang factory in Scotland. There was a great hoo-haa about the French complaining about the move to Scotland, but Cambuslang workers saw it as the return, since the French had 'nicked' the production of the Sensotronics in the first place.