Thanks to everyone who particpated in the Third Survey. The results were compiled from hundreds of votes for catalog covers from the Prewar, Postwar, and Modern eras.
The three winners were clearly ahead of their competition. Tallys among the runner-ups were closer. The submissions were made January through September 2005.
See the results of our Second Survey here

The Third Survey question was:

What are Your Favorite Lionel Catalog Covers?

Prewar - First Place
The winner, with 29% of the vote, is the 1926 Catalog Cover.

Runner-ups in the Prewar group were 1931 (18%), 1938 (16%), and 1942 (16%).

Postwar - First Place
The winner, with 30% of the vote, is the 1952 Catalog Cover.

Runner-ups in the Postwar group were 1949 (16%), 1957 (12%), 1954 (11%), and 1953 Advance (10%).

Moder Era - First Place
The winner, with 29% of the vote, is the 1996 Century Club Catalog Cover.

Runner-ups in the Modern Era group were 2002 Volume 2 (20%), and 2000 Volume 2 (18%).