Hello all. Last week I posted a question about the different color blue PF25's with unpainted rim and paper labels. I had 2 with identical labels and 1 was a much lighter blue than the other. Some posters suggested that it may have been a later version or perhaps manufactured in England. The lighter blue one was in a box marked "Made in USA" and had on the application table the latest date was 1974. So it was certainly not a later version and not made in England (assuming, of course that the box was the one that the filter came in). I suspect that Delco had several vendors that supplied the paint or did the paint for them and for this run that was the color available. Thank you all who posted a response. As usual you all were a great help.
Jeff
Jeff