This beautiful french writing desk has a number of necessary repairs, the fine marquetry is being repaired in this (upside down) pic.
The fine leather top (skiver) has many deep burn marks, many down to the wood base, in an antique of this quality, the leather is better repaired than replaced as the value and authenticity will suffer.

The gilded mouldings  are quite worn and require 23.5 carat gold leaf to restore to pristine condition

You can see the burnt leather skiver – possibly – probably cigar or cigarette damage.

The antique leather top writing desk now filled and repaired.

Fine French antique writing desk, fully restored