Alberto is correct as far as
France is concerned for the euros 1500 threshold but there is something else to be considered :
- if the coin is exported in the EU, you only need the certificate of export
- if the coin is exported outside the EU, you need the certificate plus an export licence : this is a sensitive issue as far as the UK (and its Brexit potentially) is concerned (a little
bit of a black hole looking forward), especially because a lot of non EU houses (NAC,
CNG) have a big London-based activity (it could impact all the
VAT, fees, etc stuff as well).
Pierre