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Probably a dot matrix style font resident in the printer.
The closest digital font I have been able to find is Pexico, which mimics a 10 by 14 grid for pixels [or dots] http://www.myfonts.com/fonts/urtd/pexico/ Your sample might use a grid of something like 12 by 14 or 14 by 14 to make the wider letters. The image is too small to say for certain.
If you want to simulate a transcript of marks, use the monospace version.