This looks like the Collings Foundation's B-17 "Nine-O-Nine", albeit backwards. It comes around here (Mesa, AZ) every now & then, & I just like being in it's company. Thanks.
Yes, I'm the same way, r.reeder. It is indeed the Nine-O-Nine, and Boire Field in Nashua is a regular stop for them. If I remember correctly their restoration and maintenance was performed in Nashua, before those efforts were moved down to the Collings Headquarters in Stow, MA. Fascinating place.