Wash the tag with soap & water then take some photos with a digital camera at as many angles that you can.
load the images into a photo editing programe and then , working on copies of the image try inverting the colours ( some times called "make negative" ) or darkening the image and increasing the contrast.
The Craftman number will jump out at you because the camera sees faint white on white a lot better than you do and the background will be sun faded a lot more than where the numbers used to be.
A real camera will be a lot better than a phone camera and sitting it on a support so it is not shaking and takes a clean close up image is betterer still.