Wrong again frown

"The Illustration London News" 2-4-1911 states that M. Adolphe Dennetier built the platform for the pigeon ring
https://books.google.com/books?id=F1tjgl4sr6sC&pg=PA168

[Linked Image from photos.smugmug.com]

and "Journal De Monte Carlo" 2-6-1883 announces his death
https://journaldemonaco.gouv.mc/var...ion/3eee415b3c183bdde71c158039aeebdb.pdf

[Linked Image from photos.smugmug.com]

SO the pigeon ring platform was probably constructed at the same time as the train station below the casino (1868) which would fit the first Grand Prix du Casino in 1872. From the illustrations and images however the clubhouse, pigeon release control, and walkway were clearly rebuilt at some point prior to 1900.

A report mentioning Dennetier in 1875
10 birds at 27 1/2 yds. and 10 at 29 1/2 yds.; won by Capt. Aubrey Patton with a Stephen Grant
https://books.google.com/books?id=JS8FAAAAQAAJ&pg=PA124&lpg