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| Glass to plastic type marbles in RAILROAD CROSSING signs... https://www.rypn.org/forums/viewtopic.php?f=1&t=38160 |
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| Author: | Steve Plucker [ Sat Jun 06, 2015 10:15 am ] |
| Post subject: | Glass to plastic type marbles in RAILROAD CROSSING signs... |
When did the railroad change from Glass type reflector marbles to Plastic type reflector marbles in "RAILROAD CROSSING" sign letters; "2 TRACK" crossing signs, ect? When did the plastic type end? Thanks. Steve Plucker Walla Walla, WA |
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