What is the oldest existing projection screen?
A lot of projection equipment from the 1890s - 1900s survive and I see some of this eBay from time to time. How about their screens?
The oldest projection screen I know of is in Saginaw's Temple Theatre. It was made around 1927 or 28. It is on some type of canvas type material surrounded with ornamentation.
The reason I ask is I have a catalog of projection equipment published around 1908 and it includes screens. I think the largest was about 10 foot and made of muslin.