The pic you show was the original Orbit Inn sign. The property looked pretty new and fresh in that photo.

At some point, they changed to other signage:

There's also a short video, at this link, about the bombing of the Orbit Inn --
http://www.news3lv.com/content/news/story/video-vault-orbit-inn-explosion-downtown-las-vegas/RZ5yyheBE0uIFNl5EhdONA.cspx