Of course, "The Watch of the Future" was only true for a relatively short time; technology had moved on with the likes of the Bulova Accutron and the early marketing disasters of the 500 all contributed to the final electrics being manufactured in 1969.

As far as I'm aware, there was never a tuning fork watch with Hamilton on the dial, but Hamilton did join the growing number of manufacturers using the electronic ESA 9154 (Hamilton Cal. 683), 9158 (Hamilton Cal. 702) movements.

The photographs below show my examples. And note the "Swiss Made" at the base of the dial :(.

The next watch is a little more interesting. It contains a standard ESA 9154 movement but it is a presentation watch for the US steel company, ARMCO. The company must have had a relatively long association with Hamilton because they also used an earlier Hamilton Electric 505 as a presentation watch. In the case of the 505, the stainless steel was actually made from ARMCO Stainless Steel and the case is marked as such, however, there are no such marks on the case of this Hamilton Electronic.