The opening paragraph, if accurate, explains that:
"The 1994 playfields were all clear coated (Diamond Plate) but clear coating was common place in 1994 so the ‘Diamond Plate’ logo is not on the 1994 and newer playfields."
http://www.hsapinball.com/HSA_PINBALL/hsa147.html
The NOS Playfield I just bought a few months ago does not have the Diamond Plate logo on it like my original one does. The NOS I purchased is on the left while the IPB 2nd Gen I purchased last year is on the right.
IMG_3144.JPG IMG_3145.JPG