The dates on the cards range.
They are numbered according to date.

Group 1, cards 1-68 are considered to be from 1910-1913. There is some doubt with regards to some of these cards though, as some are dated later, but are still in the same range. Which they can tell from the individual beads being numbered as well as the cards. The museum numbered the cards and places them in the right order, while the company Sick & Co numbered all the beads. These numbers range from 1 to 19726.

Group 2, cards 69-150 are from 1920 to 1924

Group 3, cards 151 to 181 are from 1930-1939

Group 4, cards 182 to 188 are from 1948 into the 50's.

The last set of cards, 189-200 are all considered to be rosetta beads. They all have an R with the number if the bead. These cards range from 1910(189) to 1958 (card 200)