I've neglected posting some of the old, mostly Central Division, material that I've been collecting so here goes. Does anyone know when Frisco changed from the diamond targets to the round ones we are all familiar with? Drawing 106-68 dated 5/3/1916 from Elliot Frog and Switch Company shows both versions on the same print.
I probably should have posted this to begin with. Here is General Instructions No. 12, Covering The Use Of Switch Stands, June 1, 1914), that contained the switch stand targets drawing posted above.
