Do They Keep Blank Die's

I think that the Copenhagen Mint must have stored unfinished dies at their mint. If you were to look at a group of lets say 2 Aurar's from the 30's that will consists of the 3 known variates of the 1938 2 Aurar. They are the open 8, half open or top of the 8 is filled in and the closed 8 which is both top and bottom of the 8 is filled in. And then the 1940 type 1 Copenhagen minted 2 Aurar, London minted the same year later in the year. The years on the coin is separated by the crown on top of the coin. Well lets get back to the reason for this journal. The 1 and 9 of the years in question are coincident in size and uniformity and the last two digit's of the years are irregular in shape and sometimes in size and can be rather crude all together. Like in the 1940 type I 2 Aurar the 40 in the year looks like it was engraved by grammar school child .If anyone has any info or knows of any book that may shed more light on this subject, will be most appreciated I can't down load the pic right now but will try again later. Thanks for reading my journal.