At the beginning of the inflationary period, in the latter part of 1922, notes were being issued with large face values, but these larger face values were not yet in millions and billions of marks. The notes were large in size and still very colourful, in most cases.
The following scan shows 2 notes issued in Barsinghausen and both dated '26 September 1922'. At the bottom of each note, it states that they are only valid up to '31 Marz 1923'.
Below, are 3 pieces issued in Poessneck and all originally dating from 13 September,1922. You can see that the top note has a face value of 100m and has 1 serial number. The second note shows that the face-value has now been revalued/overprinted to 100,000m and the original serial number and face value have been blanked-out. The 'valid until' date of 15 December 1922 has also been blanked out, as the revalued note was obviously issued after that stated date. When the overprint was applied, the note was given a 2nd serial number. The very interesting thing here is the type of 'very heavy waxed' paper the notes are issued on - quite unusual. The last red coloured note shows an overprinted/revalued 500m note with a new face value of 50,000m.