Interesting to note, if you look at the place where the date is, the blank for the year says 194_ , suggesting that these certificates were in use for the decade of 1940-1949. And that also confirms Bruce's finds of these being done in the "good 'ol days".

On another note, I have Photoshop and could try to colorize it for you, but I know a fellow graphic artist with better skills than I, so I will ask him to give it a shot too.