by Allen Hazen
No, Monongahela's weirdness was BLW "Sharknoses." EDM5970's suggestion is plausible: that the railwelding cars (as the units had become) were serviced on the BLE at some point, explaining the stencil. I have no information of when the ex-Erie-builts were used in railwelding service. I recall seeing what must have been one of them, on a siding near the Albany-Renselaer Amtrak station, in (probably) 1976 or 1977. Painted a shade of blue not too far from Conrail's locomotive color.