The Marvelous Land of Oz

A Reilly & Lee imprint is conclusively later — the firm was renamed from Reilly & Britton in 1919, so any Reilly & Lee copy is a reprint regardless of the 1904 copyright date. "The Land of Oz" shortened title and "Popular Edition" wording on the title page or spine are reprint tells. Later printings are also reported to carry a reduced colour-plate count against the 16 plates called for in early printings, so collating the plates screens many reprints.