When I rode Caboose 0579 on the 168 volunteer-donor train, it looked so bright and shiny. I forgot when the bright red paint stopped being used, so checked my files. Note, this applied to the RGS also.
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Denver & Rio Grande Railway
Burnham, May 24, 1916
Gentleman:
Effective on receipt of these instructions, we will discontinue the use of brilliant red on caboose cars and paint such cars the same as other freight equipment.
Acknowledge receipt and advise if understood.
Respectfully, J. F. Enright