This is a CaseLabs Magnum T10 computer case. No longer in production as of 2018 (the company went bankrupt), these CaseLabs cases are massive and are designed for insane watercooling setups. I used it in a build back in 2012 and it's been sitting unused for about a decade. Here's the configuration I got:
Color: Black Matte, ATX Layout: Reverse, MB Side Door: XL Window, MB Door Window: Clear, PSU Side Door: Solid, PSU Door Window: None, Top Cover: Standard Ventilated, I/O Panel: None, PCI Backplate: Hex Mesh, HDD Cage Type: Standard.
It's in great condition but I had to punch 2 screw-sized holes in the middle divider in order to mount the watercooling reservoir. Other than that it's in perfect condition.
The hardware is also yours if you want it. It's obviously vintage. If you're curious it's an Intel 3930k, 3x Nvidia GTX 680 in Tri-SLI, and 16gb of DDR3. It has no HDDs. For cooling there are 3x 360mm radiators with waterblocks on the 3 GPUs, CPU, and motherboard. There are a total of 16 fans connected to a fan controller. I have no idea if any of it still works.
Original product page (via WayBackMachine): https://web.archive.org/web/20120504044910/http://www.caselabs-store.com/magnum-t10-case/
GamersNexus postmortem video on CaseLabs: https://www.youtube.com/watch?v=sh1kipY3D_0