Steve,
It seems to me based on my experience that all the unique/good/rare Griswold pieces tend to come from the Erie area. I've also gotten some unique items from the Columbus, Ohio area. I feel that a number of pieces, especially plated pieces, were not widely distributed. I'm sure some were uniquely made by workers from the Griswold factory (i.e., as "government jobs") and were not production runs. I don't believe this to be the case with this PN 2808. I believe this one falls into the small TM hammered series- maybe the #8 skillet.
Roy Meadows