This is a 36 card set representing actors of the era.
On the reverse of ach card you will find a mini-profile of that actor.
This set contains cards for:
Paul Robeson, Bela Lugosi, Boris Karloff, Buster Crabbe, Buster Keaton, Errol Flynn, Groucho Marx, John Barrymore, Johnny Weissmuller, Lew Ayres, Stan Laurel, Oliver Hardy, Raymond Walburn, Tom Mix, Al Jolson, Noble Johnson, Charles Laughton, Frank Morgan, Paul Muni, Harry Carey, Colin Clive, Ernest Thesiger, Dwight Frye, Robert Montgomery, Wallace Beery, Robert Donat, Lincoln Perry, John Carradine, George Brent, Douglas Fairbanks Jr, Lyle Talbot, Will Rogers, Ronald Colman, Nelson Eddy, William Janney, Buddy Rogers. 
Multiple series sets are available for other decades.
The watermark will not appear on the cards you will receive.