Mission Oak Slag Stained Glass Desk Lamp W. B. Brown
Acquired from a storage sale close to home. I believe this lamp goes back to the early 1900s. Signs of wear are visible so please refer to the photos to hopefully get a general idea of state.
One of the glass pane has a small chip as shown. Some of the wood has surface crack due to age and humidity.
All in all this is a beautiful lamp and it's a survivor. If you have questions please ask.