FYI - here is a bit more information on the continued manufacturing of the former trust brands (Piedmont included) after the dissolution of the ATC:
http://www.jimsburntofferings.com/pa...gett_duke.html
Finally, with respect to the pack in question, I was actually a bit surprised it's a 10-count pack. The packaging looks more akin to 12-count packaging (i.e., the tax stamp would say twelve along the bottom, not ten). Also, the "reg. u.s. pat. off." stamping on the front is interesting. I'm not sure when packagin frst began bearing that language (maybe someone else knows), but that may help better date the pack to a specific year.