Here is the deal with VC's Certificate of Authenticity and why it's this expensive. The watch requiring a C of A goes to an independent department, not part of restorations, and is fully disassembled. The originality and authenticity of each part is verified, as well as their cosmetic and functional condition. The watch is then re-assembled and a report prepared for the supervisor. If the watch is indeed both original and authentic, a hard-bound and hand-lettered 4-page document, not including covers, with photograph is prepared. This is your certificate.
The paperwork that came with the watch when new is much abbreviated and called a Certificate of Origin.
A timepiece can be submitted for the C of A without being serviced. If there are non-original parts, they would refuse to issue a certificate and you may then decide to pass the watch on to the restorations department where they would replace the questionable parts so that you can obtain a C of A. Also, a watch does not have to be in running condition to receive a certificate, but it must be complete.
The parameters for restorations/service are different. Their assessment is based upon returning a timepiece to as close to new condition as possible. They will make mandatory certain service items that affect function, and make optional other items that are only cosmetic. Nevertheless, they apply a high standard to this decision so a badly weathered dial or scratched case would likely be considered for mandatory refinishing. It is strictly "take it or leave it", so you cannot persuade your way around these dictates.
Hope this helps explain the process.