Train phone antenna on locomotives dates photos between 1944 and mid 1960.

F3A unit 50 (lead unit) was part of an order from Jan 1947 A-B-B-A Set.

Jan. 1957 renumbered to #50 (KCS in the Deramus Era, p115, Marre & Sommers).
Elm Grove, LA
(About 15 miles south of Bossier City on the L& A Shreveport-New Orleans line.
Thanks to Bob Brown for help in ID'ing this  location)
Date: Sometime between Jan 1957 & mid 1960)
Any help narrowing down the date would be appreciated.
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