Mark II, DOS, cards must be inserted manually into the boards.

Mark III, DOS, automatic board function.

Mark IV

MkIV has the same software as MkIV" (see below), but it does not have the new infeed and it is without the automatic board function.

We recommend this model to those who for some reason do not want to use the Duplimate board.

Mark IV" (bis)

The MkIV'' puts the cards in the board at very high speed. Comes with a comprehensive software package.