The pinball community has a very robust modding community, and 1993's Indiana Jones machine is considered a classic of the genre.
Within the game, there is a mode where you gather Indy's "Lost Treasures," so these were concieved as metallic target decals, designed to enhance the playfield by decorating all of the previously bare targets.
Here we have clean illustrations of the IDOL of the INCAS, the DIAMOND of SHANGHAI, the CROSS of CORONADO, the HEADPIECE to the STAFF OF RA, the REMAINS of NURHACHI, and the FISH of TAYLES (an inside joke referencing the designer's previous pinball machine, Fish Tales).