A customer asked if I could engrave an old B & W photo of his grandpa's train on the lid. I had to make 2D art out of the photo he provided.
He originally wanted a small 4x6 engraving, but when I converted and changed the art for engraving, I simply had to try the whole lid! When he saw what I'd done he and his grandpa gave me permission to share the engraving, and now I do... occasionally customized with special numbers and logos for different railroads!