Sindy’s Friends Royal Wedding, 42106, was not in the 1986 Sindy brochure.
As far as TLSM can tell, the Sindy Fashions Classics Outfit 43169 is the same dress that they used for Marie. Even though the photo of Marie’s dress, on the back of the box, more likely is the same as the uncatalogued dolls: 1985 Sindy Beautiful Bride, 42018.
At least it seams like they decided to use the veil differently on Marie’s head then they did on Sindy’s.
Thank you for sharing your photo Vectis Auctions Ltd!