A couple of steam locomotives that I bought recently have electrical signs on them. I assume these are to warn people walking on the running plate about possible overhead wires. (Is this correct?) I think these are garish and I can't remember them as a lad when I was trainspotting about 1955 - 1958. Can anyone tell me what year they were introduced? I think I'm going to remove them anyway as I think they look totally wrong for a 1950's layout. Perhaps I should have bought the version with the earlier emblem but I'm not fussy about which ones I have.