Swag Prism Chandelier

The Main Body from Top to Bottom 36 inches Long and 8 inches wide,the light legs are 5 wide and 5 inches tall, the black plastic light stems on them are 4 inches high,It weighs about 20 pounds,without the chain, Theres the Letters GIM and 495 stamped inside of a top piece,There are 120 30mm Prisms and looking at them Bluish in color(pics). 4 lights are inside and 5 light legs outside,there's a 3 way nob to turn on the amount of lights you want on, The gold chain is 15 feet long, we don't know what it is made of,maybe Bronze ?? The prisms are glass and bluish in color, we have no idea what kind or what quality they are,We don't know what style this is,we have no Idea what we have here,all we know it was given to my Grandparents as a gift, that's it, we're thinking about selling it but don't know yet,Please help us out if you can. Want to find out everything we can on this,it is Unusual. Thank you for your help.