Hmm... I actually have one those. It's not inscribed nor autographed. But I have one of the manuscript scores. Hmm....
It's one of the famous Mathilde Pincus "Green Books." Mathilde did one for every show Chelsea Music copied, and they were opening night gifts to everyone involved. I believe she started doing it back in the 1960s, and there must be around 50 volumes. They run the gamut from CABARET to COPPERFIELD.
They're the Piano/Conductors reduced from the orchestra scores and in the hands of various copyists- Mathilde, Vic Jaroway, Christine Ambrose, Don Oliver, etc - who worked on the shows.