Illinois Sesquicentennial Ashtrays not found in a catalog ≈7¼" circa assumed to be 1968 as marked, unidentified glazes, photos from the collection of Michael Bono

Tops read:  1818-1968 and LINCOLN, STEPHEN A. DOUGLAS, LOUIS JOLIET, and JANE ADAMS.

Bottoms read:  ILLINOIS SESQUICENTENNIAL HAEGER 1095 © USA for the first, and similarly for 1096, 1097, and 1098.

Bottom reads:  ILLINOIS SESQUICENTENNIAL HAEGER 1095 © USA

The printing on this box, a rare survivor, is a bit misleading as it shows all four ashtrays in the set. See next photo.

As you can see, the box is just large enough to hold a single ashtray. Evidently they printed just one box and used it for each of the ashtrays in the set.