Help me identify antique dining room set

[mtannon11]

Hi I am looking to get some information on an antique dining room set that I just pulled out of storage. Im moving and would like to know if this furniture is worth bringing with or possibly how much I could sell it for. I know nothing about it and the only marking I could find on it is located on the underside of the large table and its either an M or a W in a circle as you can see in the photo.
These were inherited from my grandmother who lived in a suburb of Chicago if that is of any help. They have been in storage for 10 to 15 years but need to finally do something with them. Willing to put in some work as well if it would increase value.
Let me know if different/better pictures would help and Ill post new ones asap.
Set includes: large dining room table, china cabinet, buffet, 6 chairs…one of which has arms