Gamma Stringing Machine. This machine is not exactly a 6004 and not exactly a 5003 (but it's closer to the former).
It has the string clamps, break, turntable, and mount system of the 6-point, Self-Centering 6004. But it has base clamps of the 5003.
See photos here: http://sdrv.ms/TMipOv
This machine is used and is roughly 2 years old. Probably has 200 to 300 racquets worth of mileage. Everything is in good working order with no known issues. If you want to use the "out of 10" rating system, I would call this 8.5/10.
Asking price & shipping:
Would prefer not to ship if possible (so if you're local to the Pacific Northwest and looking for a machine, definitely let me know). If I cannot find a local buyer, I will ship. We would have to estimate and work out the shipping costs, but we'll cross that bridge when we come to it.
I'm asking $825 for the machine.
I have most of the tools that came with it. I can dig through and take pictures if you'd like. Just ask.
Contact me via email: sstchur(at)yahoo(dot)com