Commercially, the biggest problem in the watch and clock business is that sales are way down. With a clock in every phone and every computer, few people are buying standalone watches and clocks. Come up with a reason for people to buy watches again and you'll have something valuable.
There are simple stands for supporting pendulum wall clocks, and movements out of their case. Here's one that's currently on eBay:

If you want to build a clock, there are plenty of simple designs around. Here's one:
Plans available.