TIMEX/Laco were among the first affordable Electronic watches. They are "hybrid" being a mixture of mechanical and electronic (electromechanical) where a small motor drives the hands powered by a button cell that lasted about a year in normal use.
Of these, the smoothest visual example is the "Dynabeat" range, having a higher beat rate. producing a reasonably smooth seconds sweep around the dial. You should know that as already stated, this is an optical illusion of sorts in that, if you move something by a very small step and a high number of steps per second, it will appear to be moving smoothly and continuously. The details of this phenomonon can be checked by google/wiki-ing "persistence of vision" and reading up on it there. It's the basic principle of movie film, and what most of us did in notebooks at school when we drew stick men in the corners of each page and made them "walk" by flicking the corners - - or even do rude things I cannot possibly describe in a family orientated forum like TWF.
Also - - there are NOT a lot of people who can service these about, so - - they may not be a best buy at this stage of your collecting quest.