7531 EMD GP35, ATSF 2828, Blue Warbonnet, Paragon4 Sound/DC/DCC, HO SCALE (GP35u). NOW WITH NEW PARAGON4 “ROLLING THUNDER” SOUND. Prototypically Accurate Sounds for the EMD GP35 Diesel Locomotive. Wind deflector type, Rooftop AC for ATSF type, Rotary beacon type and location.