Picture is of a Dpmin-11EC or Dpmin-12EC. As of 15-Oct-2013, we are now selling the Dpmin-13EC with a restoration of the margins that was slowly lost due to printer drift from the 1990s to 2005. With the new Tpmin-6EC and the new Dpmin-13EC, the original margins per Ogden Lindsley's stipulations for SCC chart standards have been restored, and you'll find that the chart labels (at the bottom of the chart) and the center of the graph line up exactly with each other (making it easier to print out on both without recalibrating for the chart labels).
The DAILY per minute chart is our best selling chart, and has remained nearly unchanged since its development as the "Standard Behavior Chart." It was designed to record the entire range of possible behavior frequencies (from 1 per day to 1000 per minute) across a standard calendar. This is the benchmark of all of our charts.
