I was -6 (born 1962) when the programme was signed so I didn't get it in person. I bought it at auction over 20 years ago. The collector who got the programme signed went to the Royal Film Performance every year (at least during the late 50s/early 60s) and got most of the key guests to sign that year's programme. The auction house sold all these programmes over a number of auctions but I bought only this one.
The ticket doesn't look too rushed to me. Maybe Marilyn could sign it on a level surface like a check-in counter.
Yes, it was that evening. The programme is actually signed by Bardot, Eckberg, Crawford and others too. I attach some other images (you'll need to click on them to see the whole images):
My friend saw MM when she was filming the prince and the showgirl in the UK. She rented a house in Surrey and my fried looked through one of the windows as saw MM sitting in a chair.
I used to be in touch with two of Marilyn's piano players, one was a young musician called to Marilyn's house she was renting with Miller in Surrey, they would run her song from the movie. He had just a pencil note from her on some music just signed M.
The other was her pianist from the Korean tour on her Dimaggio honeymoon.