Historia di Aruba
This is an amazing website full of Aruba history including photographs.
If you scroll about half way down you will see a few photos of Palm beach in the 1950's, including an artist rendering of the newly completed Aruba Caribbean Hotel, the first luxury hotel on the island.
Also included are photos of the original:
Aruba Beach Club
The page also mentions the Ritz Carlton but evidently has not been updated since construction has progressed.