Electric and Electronic
Edox was founded by Christian Rüfli (or Reufli)-Flury in Bienne in 1894, he named his watches Edox, which means the hour in ancient Greek. The hour glass logo he put on his watches has adorned all Edox watches ever since. After his death in 1921 the brand was taken over by Robert Kaufmann-Hug's Era Watch Company, and he concentrated on wristwatches and phased out the pocket watch production. Throughout this period the Flury family remained involved in running the business. In 1971 Edox became affiliated with the General Watch Company (GWC) under the control of USUAG. Then, in 1977, this was restructured with Technos, which was then quickly followed by a further restructuring to include other brands such as Certina. In 1983, in the face of the ever increasing quartz induced watchmaking crisis, Victor Strambini of Vista Watches took over the Edox brand and moved the company to Les Genevez, in the heart of the Swiss Jura Mountains where they remain to this day.
I rarely see Edox Electronics, in fact up to now I've only seen photos of 4 others, none in such simple styles as mine.

Edox only seem to have used ETA-ESA Dynatrons in their electrics, like the 7 jewel 9157 used in these two from around 1975.

The French JAZ brand is far better known for it's production of clocks than watches and was originally the brand of the Compagnie Industrielle de Mécanique Horlogère, later to become  Jaz SA which in the 1970's further incorporated the Groupe Framelec, the whole was by 1981 in the control of the government under the guise of Matra Horlogèrie, and then JAZ finally formed part of the Seiko subsidiary CGH (Compagnie Générale Horlogère) in France.
The JAZ clockmaking business embraced the electric and transistorised era far earlier than the majority of the French clock and watch companies, and even today their mid 1960's Jazistor/Transistor clocks can easily be found. It doesn't seem that JAZ produced many watches prior to the late 1960's, and then all of a sudden a fairly large range seems to have briefly appeared, mechanicals, automatics, and a few LEDs, LCDs and electronics, as well as the renowned JAZ-Derby Swissonic jump hour.
Like Edox, I come across JAZ Electronics very rarely, and again like Edox, all seem to use ETA-ESA Dynatrons.

The first is a NOS item, marked Swiss Made, coded 771112,  and  from 1977 with a  7 jewel ETA-ESA 9158. Still with the original watch jeweller's stock sticker on the back indicating it's cost was 189 French Francs when new, so it would have  a cost of somewhere in the region of £200 in 2012
The second is slightly earlier, from 1975, coded  751008, with a case marked as being gold plated. This one is marked as having a Swiss movement and not "Swiss Made", meaning, that other than the ETA-ESA 9157 movement, all other parts were French and it was more than likely assembled in France by JAZ.
Timex produced a large variety of Electric & Electronic watches from the late 1960's  until around the end of the 1970's. A really good source of information on Timex, (and many other brands) can be found here . Timex seem to have been somewhat haphazard with their dial descriptions, some Electronics  are actually marked Electric, and vice versa, and, to confuse matters even more, a fellow collector has an example of my 1973 day/date with the date in English and inscribed "Electronic", so even the same catalogue model can differ.
1973 Electronic, Model 51 movement
1973 Electronic, Model 52 movement
1973 Electronic, Model 51 movement, original strap
1971 Electric, Model 41 movement, West German
1974 Ladies Electric, Model 69 movement
JAZ gold plated two button and recessed reset digital from 1975, coded  751502, marked "Swiss", with an unidentified ETA-ESA movement
Timex two rotating button SSQ from around 1975, made in the Philippines.
French Yéma digital chrono, from the mid 1970's with a Seiko Y799A movement, see the JAZ electronics above for the Seiko connection
1986 Casio alarm chrono, with a Casio  593 movement, on the original bracelet
Seiko A021-5000 from February 1978, two button plus crown set. Not in the best condition, but not easy to find these days.
1972 Backset Electronic, Model 87 movement
LeGant was a brand name used by Montgomery Ward, the American department store and mail order company during the 1970's. The QS range appeared in manual, automatic and electronic form. Some styles actually appeared in both automatic and electronic  forms, such as this World Time automatic:
Whereas the automatic version used a Ronda movement, the electronic used an ETA-ESA 9154 Dynatron. Paul, who runs the inspirational Electric Watch site, has a lovely example of the slightly different electronic, which you can see here
My electronic QS dates from 1973 and features a Seiko 3302A, which is unusual in having contacts as well as a transistor. It can only be accessed through the crystal and has the crown between 2 & 3.
The bracelet is a gold filled Flex-Let from the USA, which is contemporary to the watch, and, judging by the excellent colour match to the case, could well be original to the watch.
Flex-Let advert from a 1951 Time Life magazine
Paul at the Electric Watch Site has the sister watch to this in stainless steel, and I recommend his site to anyone with an interest in electric and electronic watches.