ACF Cylindrical Hopper 81024 by Frisco.org Posted on December 1, 2015 ACF Cylindrical Hopper 81024 ACF Cylindrical Hopper 81024 new in August 1962 (Frisco Photo). This entry was posted in KW Collection and tagged 81024, American Car and Foundry Company, Cylindrical Hopper, Hopper. Bookmark the permalink.