I don't know much yet about the history of these presses.

Manufactured in Chicago.

 

Relevant patent is probably 957,373 (issued May 10, 1910 to Walter Potter, Chicago).

Poco started about 1912

 

bought by Hacker

 

bought by Vandercook in 1937

 

Paul Moxon sent along the picture below, scanned from a 1923 ATF catalog.