Current avatar: Mom, 1960
"I'm playing all the right notes but not necessarily in the right order."
...Eric Morecambe, OBE
I cannot help with the date or the locomotive ID, but, WOW, what a photo. That is a great family photo to have, Big Man. Very cool! Thanks for sharing.
"This may actually be a picture of your great uncle while he served during WW 1. Baldwin Locomotives built a number of locomotives in the 2-8-0 configuration for the US Army to serve in England and France. The locomotives were designated as Pershings. ..."
Doing some more research on my great uncle Briscoe, I discovered he joined the Army at age 18 in 1909 and served a three year tour. His military record indicates he was an "attendant" at the State Hospital in Iowa at the time of his enlistment. The 1910 US Census has him as a private in the Army stationed in New York. He was discharged in 1912, and returned to civilian life until he was drafted in 1917. His draft card in 1917 indicates he was a "freight engineer". I know he went to France during the Great War, as I have a letter he wrote shortly after arriving there. After the War, he again returned to working at the State Hospital, where he is recorded in the 1920 US Census.
Given all this, the old photo may very well be a photo of my great uncle Briscoe during the Great War.