Merriam Webster Collegiate Dictionary And Thesaurus Box Set, 9th Edition. The Dictionary was published in 1988 and the Thesaurus in 1991.This was my dad's and was very well displayed before I stored it for about a decade. 

This set is in good condition with some knicks and marks on the slipcase and bindings. Check the images - one of the books as a slight tear on the binding No markings, dogears, writing, or torn pages or any issues like that with these books. 

Feel free to message for more pictures or to ask questions.

Thanks!