I suspect it is probably for a Middle East based DC-8...
There is probably only half a dozen of these flying currently...
Have a look at a current DC-8 operators list (with s/n or registry)...
Probably DC8-62 or 63, or even DC8-72 or 73... executive jet interior...
Jet Aviation Zurich generally manages such airplanes...
Could also be TAG Aviation...
Contact them, is all I can say.
xxx
Happy contrails