Yes, and there's this...
Brown or White Eggs?
Interestingly, Bond is said to have a strong preference for brown eggs, compared to white eggs.
The eggshell colour of an egg depends on the breed of the hen. Generally speaking, white shell eggs come from hens with white feathers, while brown shell eggs are produced by hens with brown feathers. Fleming mentions specifically that Bond likes the speckled eggs produced by French Maran hens which are indeed brown.
(If you want to try a French Maran egg, 
do a search for French Maran eggs, and perhaps you find some available near you.)
Nutritionally, both brown and white eggs are identical, unless the feed has been enhanced with for example Omega-3.
In another short story by Fleming, 
007 In New York, Bond's preference for brown eggs is repeated (read more below).
From here...
https://www.jamesbondlifestyle.com/articles/how-james-bond-really-likes-his-eggs#:~:text=The Man With The Golden,." (Chapter 7).
And Julia Childs is notoriously famous for only using Marans eggs in her recipes.