A Rare One Now Extinct: I don't think you will find any old (ca. 1957) Boston and Maine heritage GPs running around these days. The last time one was photographed, as far as I know, was in 2016 by myself, shown below from an Aug. 2016 ride, and several rrpictures.net fans. I was searching for pictures of this unit as a response to @jeickerman, who wondered about the number of GPs left laying around Pan Am's various facilities, and finally found this pic that hadn't been previously posted. This GP is definitely gone, having been sold to Heber Valley RR. B&M livery is now in short supply, if it exists at all.