Years since I've heard these ( late 70's ? ) but they impressed me then.....do look a nice buy for someone though.
http://www.ebay.co.uk/itm/121224513016?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
http://www.ebay.co.uk/itm/121224513016?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649