Re: PRR Keystones ??

Bill Daniels <billinsf@...>

The circle keystone herald was used from approximately 1936 up to 1954. It was replaced by the shadow keystone which lasted until about the early 1960s. Sorry for the vagueness but I'm going from memory on these. Remember that the earlier heralds lasted until the car was repainted... which may have been as much as 10 years (or even later...).
Bill Daniels

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