Hi guys thanks for the kind words , as far as the serial numbers on them go like this 153y813. After I got them all hooked up to my reciever I called Klipsch and the guy at customer service told me that they were make in 1983 and they were an unfinished walnut(I think???). Someone has since put a shiny stain or varnish on them. As far as the grill clothes go they are the black with the copper and black rectangular Kilpsch logo emblem at the top. Hey Rick what was that reciever that you are talking about? Can you put a link on a post to it. That's Cool man my fathers name is Ricky and he had a pair of Heresy's back in the late 70's when I was a kid , that is the main reason I wanted a pair soooo bad because I can still remember How they ROCKED the HOUSE!!!!!!!!!!!!! I am currently running them into my reciever which is a Denon DRA-295 a 100w 2 ch amp. I only wanted a 2 channel amp for these two speakers not surround sound. Thanks, again any suggestions...please lay'em on my