I picked up a menko card of Shigeo Nagashima off of Ebay recently. The card is from an uncataloged set from around 1973. Here's the front and back of the card:
What's significant about this card is that the picture on it was swiped from a 1973 Calbee card (#5):
Ryan had mentioned in a comment a while back that it's not uncommon for unlicensed cards to be made today using all sorts of available images. I guess this has been going on for quite a while.