Solid Oak Executive Desk

I believe that this is a solid oak executive desk but I'm not 100% certain.

The desk is extremely heavy and hard to move.

It has a glass protective layer on the top that is roughly 3cm thick.

There are 3 drawers on each side and one small drawer in the center.

The sides of the table are one solid piece of wood with no holes other than for screws.

Even a ballpark figure of what something like this is worth would be greatly appreciated.Thank you so much!