Thank you @geek2nurse (and @shronimo) for the design files! Had to try this out for myself.
Used PG medium draftboard for this test build with @shronimo’s SVG file as a starting point. I engraved “Christmas 2018” on both sides by first engraving the text and then cutting out and flipping the the ornament’s “outer ring” before engraving the text on the backside and then cutting everything else out.
My version of the ~3-inch SVG provided below… 
nativity_ornament_resized.svg.zip (14.3 KB)