France Unesco 2009 Unlisted In S G - Why?

The stamps shown were bought in an official pack, comprising the issues for September to December 2009, from La Poste whilst visiting France a few years ago.



As I live in the U.K., my main source of reference information is Stanley Gibbons, however the pair of stamps remains unlisted in Stamps of the World up to the 2019 issue, even though other UNESCO issues can be found in the appropriate section.

Online catalogues do list these stamps, suggesting that they are recognised by Scott, Michel etc.

Does anyone know why SG have not listed these stamps, yet, please?

Hi.
Not Council of Europe but Unesco

Hi Outremer,
I have a copy of SG France (Part 6), 7th edition dated 2010, and there is a section in that catalogue for UNESCO issues.
Unfortunately it only lists up to December 2008 releases!
A more recent Part 6 will definitely cover your stamps.
Hope this helps.
Regards
DavidR

In the SG SOTW 2018, the UNESCO issues skip from 2008 (U61-62) to 2010 (U63-64).

Thank-you Vayolene, title and content corrected! I must have had a senior moment!
Thank-you DavidR and 22Crows, still await someone from SG to explain.

It may be a simple case of SG not having received examples to prove that they have been issued, which has been their explanation in the past.