Mata Hari is a great game, again a game that brings back yesteryear to the late 1970's when I first got my young hands on one.

The colors appear ( in the photos at least ) to be a little wishy washy
Not as vibrant as the original artwork.

Judging only from the images, the colours are quite washed out and "just not there".  Had a quick look at some images on ipdb, and the reds and blacks are really not up to the mark at all.  I have no idea how good overlays can get in terms of authentic colour reproduction, but in this case, I would say not there.  Personally, I would take a bit of a beat up PF as compared to overlay, me thinks.