![Keystone C-4 U.S Coast Defense Ships](http://www.collectingkeystone.com/wp-content/uploads/2014/02/IMG_0609-150x150.jpg)
These ships measure 7″ x 2″. The C-4’s came with several different set all first appearing in the 1942-43 catalog. The sets were the #671 Battle Fleet, #652 Convoy Fleet the #525 U.S. Coast Defense Fort and the #527 U.S. Coast Defense Fort.
From my private collection.