Just saw this, if anybody is interested:http://www.ebay.com/itm/Vintage-1980-Old-United-Cutlery-UC942-Survival-Tool-Card-Camping-Fishing-Hiking-/261135112650?pt=LH_DefaultDomain_0&hash=item3cccdd99caVintage 1980 Old United Cutlery UC942 Survival Tool Card
I have often wondered about them but I do not see them fitting in the wallet pocket for credit cards. Also, they are always costing too much on eBay, used.I have several of the cheap metal ones, shown in the 1st picture and they are OK. They cut and make a decent bottle opener too.