Most of the "dealer display" wall clocks shown around the internet are bullshit.
Anything with a "Jurgen Bolsch" (something like that) quartz movement is bogus.
I do not fully agree on bullshit and phony. they do not have an omega mechanism ok, omega has authorized like other breds to another company to build these with its logo, respecting some parameters. the Chinese and Indians have benefited by producing many watches but not authorized by omega etc .. remains however a fake. the reproduction of a trademark has me is forbidden, I think if there is a fake there is also a real one.
Original display clocks of the type you posted were not made by Omega, but by an independent company, e.g.: RUEGG S.A. in La Chaux-de-Fonds.
There's a couple of discussions here on the forum if you want to search for them.
Here's one.
https://omegaforums.net/threads/dealer-clock-authenticity.89341/