CRT Markers

Since someone asked about what replaced the elegant rotating brass marker castings on CRT cars, Bill Wulfert dug up an ancient photo of a wood L car with the daytime marker paddles.  I believe these particular ones were gloss white, and of course there were other colors in use.  This picture was taken during the period when wood cars were often mixed with 4000's, something that was no longer done when the 1797 became operational.  Thanks, Bill!