Never heard of them? No, nor had I but they do still exist although now seemed to be owned by a Chinese company.

I was given this example by a good friend. It has an ESA 9200 Dynotron movement within it; this small movement was developed in 1975 primarily for ladies watches but is occasionally found in thin mens's dress watches such as this Lukcom. Like all Dynotrons, this is an example of a Transistor Controlled, Balance Wheel movement.