Mitsubishi Monitor

Hello: I need some advise, if someone can please help me out regarding identifying what this monitor is for. I have been given an older 20' Mitsubishi monitor with two 15 pin connectors on the back (signal A, Signal B) along with 5 of the round connectors with the two pins on each. Each round silver connector is labled R, G, B, Comp HD, and VD, respectively, obviously some sort of color connectors for RGB color, I think. It has no video cables for the 15 pin connectors, so it looks like I need a male-male cable to attach it to a PC. I am not sure what type of system it is supposed to connect to (PC, MAC, whatever). That's what my question is. I am unfamiliar with dealing with fancy monitors like this with all the connections. I did a Google search and it said it cost $2235 years ago, but no other info is available. Below is the model number: MITSUBISHI (Model #HC3925KTK) 20" .31 DOT 800X600 NI $2235. On the front it says, Diamond Scan 20M and another label says "Digital Post". Maybe its for a Digital computer. 1.) So, is this monitor worth anything? 2.) What computer can I test it on today, to see if it works? A PC or a MAC, Sun? I don't know. This seems like a dumb question, but I have not seen a monitor before with this sort of connections, so I would appreciate som advise on this monstrosity of a monitor. It's a giant thing!