P300 or 600 next to it?
Not a Printronix. Those look like this:
http://www.fib.upc.edu/retroinformatica/exposicio/ordinadors/Printronix-P60…
Since there's an 11/60 in the image as well, this is probably a DEC
LP25. A photo of the one that was at DEFCON 17:
http://farm3.static.flickr.com/2362/3796488999_d3bafb02e7.jpg
We had something that was likely the OEM version of the LP25 in our
Prime shop years ago. Band printer, 600 LPM (or maybe 450 with the
mixed case chain), iirc. I can't remember who the OEM was, though.
De