"Piedmont 42 seems to be scarce but I still think that might be a bit of a function of people not always realizing they have one."
Probably true. Here's nothing new, and may be an insult to those who have read or responded to this thread. However, for those who are new to the issue (like me), and want to do a quick check of their Pied.'s without getting out the magnifying loop, here's a good "arm's length"* look at factory difference:
x5.jpg
* depending on your eye-sight
