in reality this should not be a problem as the CITES regulations relate to import /export of commercial quantities of endangered species material and anything under 10kgs and anything for personal use by the purchaser should be exempt.
However, if you wish to obtain a CITES passport ( or whatever they call it) you might need to get the age of the instrument verified by an expert ( official) body, like a museum . I did this for my old Uilleann Pipes when I visited the USA in 2002 because the instrument contained Elephant Ivory parts. I obtained a letter of verification for the date of manufacture from the Dublin Museum curator of musicial instruments... even though it was myself telling the curator how old the instrument is. This letter was then included in an application to the relevant body... fisheries and wildlife or the like...
So, I'd suggest contacting Neil Wayne or the Horniman Museum.
I currently get around the problem of exporting new instruments, containing materials that could be construed as endangered , by either having the customers collect them or just avoiding making for customers from outside Europe.
Good luck with this.
Edited by Geoff Wooff, 05 August 2017 - 08:09 AM.