According tp Steve Priest's authoritative book Santa Fe Freight in Color, which is the first and last volume of this series, thaks to you dodos that didn't buy this one, BX171 numbers 625325-625359 were built in 1974 by PC&F. He has photos from 1986 and 1987, two different schemes, and the one from '87 is said to be used for shipping beer from the Coors plant, which would be good for decent beer as the car is insulated. For Coors, well...