My name is ***** ***** I would love to help.The only photo here is the writing you described. This is the mark from production indicating which piece this is, so this is not a maker's mark. Look inside drawers if it has any, sometimes marks were burnished there.
The next step would be for me to see pictures of the desk to get a better idea of the time period and value for you.
Use the Add Files feature on your screen to add pictures (one at a time) and I will be able to complete my answer, thank you!