If it's for a Williams/Bally game you could talk to Rick @ Planetary about the license.

If it's a Gottlieb I forget who you need to talk to now, but there is a way to get official approval on that. Is it Steve Young? My understanding is that the Gottlieb stuff needs to match the original, so not sure about doing something that isn't silkscreened onto glass.

I think it is the Mondial Group. They used to have a website, but it won't load now. I think Steve Young is the "keeper of the license" for them, so contacting him is a safe bet for Gottlieb.

It's up, at least here: http://www.mondialgroup.com/gottlieb.htm

If it's for a Genco, Chicago Coin, Keeney, or Exhibit Supply machine, then copy to your heart's content since those companies are long out of business.

Yep, that's the site. Must be my work network blogging it for some reason...

Not True, We were contacted recently by the guy that bought the Chicago Coin Licensing wanting us to do repro work for him.....Just because a company is no longer in business does Not mean that someone didn't buy out the Licensing for there products....

https://pinside.com/pinball/forum/topic/gottlieb-rights-on-backglasses#post-2115416

Interesting that the Chicago Coin Licensing wasn't part of the deal when Stern bought them in the late 1970s. I would have though CC IP would have been included and somehow still be under Stern, unless Gary sold it at some point.