In general, most vernacular furniture cannot be traced to the exact maker unless the information was handed down through family generations or written/marked somewhere on the furniture. This is not uncommon with furniture and valuations are based on various other criteria. I would be happy to look over the desk for you. Please send images at your convenience. It does not cost extra to send pictures here.
I am wondering if you are still interested in having your item assessed?
Please let me know and do you have requested images available?
I look forward to reading back from you.