This auction is for a used vintage Cox 049 RR1 crankcase and new LEFT hand rotary valve for glow model airplane engines. Crankcase could have been gold as it has a shade of gold in the grooves or could be fuel residue. $6.50 shipping U.S. FREE SHIPPING FOR ADDITIONAL COX ENGINE PARTS FOR U.S. AND INTERNATIONAL BUYERS UNLESS WEIGHT GOES OVER 8 OUNCES. I am listing a bunch of engines, parts engines, project engines, new and used model airplane and boat parts. Shipping rates keep going up and I can't stop them but I will still try hard to combine shipping and give you the best shipping rates I can and refund you over payment on shipping rates if you buy more then 1 item.