The Standard International Encyclopedia Unabridged Deluxe Edition Complete 1954
These are from 1954 and do have normal wear (corner / binder wear and foxing on first few inside pages).
I'm assuming they are not as bright red as they were originally.
This is a complete set.
The worst condition issue I see is in volume 19, inside binder. See the last three pictures.
There's no writing or names in these books.
Book Size is approx. 5 3/4" X 8 3/4".
USPS Media Mail shipping to the Continental U.S. will be a flat fee of $25.00.