"Images of Rail: Boston & Maine Locomotives" (Imagine not quotation marks but italics since that function still doesn't.) from Arcadia Press, 2002, shows the application of lens-mounted train numbers on pp. 50, 52, 62, 66, 69, 77, 78, and 84. While 3625 is a valid number for a P-2, 3719 was the highest number in the 3700's on the B&M, assuming accuracy on the part of the late Harry Frye on p.141 of his "Minuteman Steam: Boston & Maine Locomotives / 1911-1958." (Again, italics need be imagined.)
Another possibility for the train number might be "75" instead of "25." Divots on the print or a clipped intersection on the "7" plus the lower support rod on the headlight could account for what otherwise looks like a "2." Train 75 had a long and progressively slower and slower history on the Conn. River.
Amazon alleges it is shipping me an "Images of America" (See a pattern here?) book for Northampton, and maybe there can be some more information from that. The Northampton Historical Society does have on-line research assistance, but only after a $40 membership is secured, assuming I understood its website.
Another possibility for the train number might be "75" instead of "25." Divots on the print or a clipped intersection on the "7" plus the lower support rod on the headlight could account for what otherwise looks like a "2." Train 75 had a long and progressively slower and slower history on the Conn. River.
Amazon alleges it is shipping me an "Images of America" (See a pattern here?) book for Northampton, and maybe there can be some more information from that. The Northampton Historical Society does have on-line research assistance, but only after a $40 membership is secured, assuming I understood its website.
"A gray crossover is definitely not company transportation."