Recent discussions on FB about the September 28, 1917 head-on collision of Frisco passenger train 407, engine 1025, and Extra 1322 East have lead me to an interesting paragraph in the ICC Accident Report. The accident, which occurred at Kellyille, OK is purported to be the worst railroad accident in Oklahoma history. Twenty-two passengers and one railroad employee lost their lives, and fifty-seven passengers and five employees received injuries. Train 407 received Order 58 at Sapulpa and Extra 1322 East received the same at Depew. Order 58 read: “ Extra 1322 has right over No 407 Depew to Kellyville”. When train 407 called on Kellyville, passenger train 408 and Extra 1343 East were in the hole at Kellyville. The crew of number 407, mistook Extra 1343 East for Extra 1322, and the passenger train continued westward. Just west of Kellyville near MP 447.8, Train 407 and Extra 1322 East collided. The high number of casualties can be attributed to the wood passenger cars, which were in 407’s consist. The ICC chastised the Frisco, because Frisco rules did not require the dispatcher to issue a middle order at Kellyville. This paragraph interested me: “Conductor Pugh of Extra 1343 (the train in the hole at Kellyville) stated that the caboose of his train was equipped with indicators and that these indicators were displayed at Kellyville in such a manner that the crew of train No. 407 could have seen the number of the train.” Numerous photographs from this era exist in which locomotives carry indicators, but I never have seen any depiction in which anything but the locomotive number was displayed. The ICC report gives us a clue that Frisco cabooses carried some sort of device that would display the train number. So, has anyone ever seen a photograph of a Frisco caboose with a train indicator? Is it possible to infer that the locomotive indicators were used to display the train number on the locomotive, al la the Espee and UP?