The values printed on the 2- and 3 Mark stamps can be found with underlying stamps of Types I & II. The overprint on the 5 Mark stamp can be found only on underlying stamp of Type II.
For a description of the differences between Types I & II, see here.
All the denominations found in the 1900 overprints were overprinted using the new, ‘bolder’ type, but only five values were issued for use. The remaining denominations are not common, but also not terribly rare.