This is a PCV valve made by Eaton. I cleaned all the pieces, bead blasted the housing, had it plated and reassembled the item. It appears to have been used as an alternate vendor's part on 67 small blocks, and as a service part on 65 thru 67 small blocks, plus 65 and 66 352 and 390 engines.
See
http://www.concoursmustang.com/forum/index.php?topic=6654.msg38107#msg38107$15.00 and I pay shipping in the USA. Send me a PM if interested.
Jim