Although undated, this catalog is now thought to be from 1948 which is the first catalog to include the Ambassador, which is featured on the cover and in the introduction. It was previously identified as 1949. (Provided by Centex Brass)
The next few pages (2-11) of this catalog have a two page layout for each model showing the trombone, trumpet and cornet as a trio of instruments. The two page layout is shown on the next five scans for the Ambassador, Special, Studio, Super and Recording models, followed by larger scans of each of these pages.
The next 10 scans are enlarged versions of pages 2-11:
Pages 12 through 20 show other brasses and woodwinds that have been added to the Olds lineup. A full scan of this catalog showing these pages can be seen at Robb Stewart’s website.
Page 21 shows cases:
Page 24 shows mouthpieces: