Thanks Chris, NIB not sure who or what that is. A quick google brought up the 'Unusual World Coins' entry for the silver sets but no mention of the gold. An ebay entry also can up for a dealer selling a set for £499, I suspect they have been on their for a while and will stay a long time at that price. One snippet, he quoted 100 sets made of 0.999 gold at 8.71g so they must be worth a couple of hundren quid scrap. Not bad for my £69 outlay.