2012 CAT D6T XL [201937] 2012 CAT D6T XL MR Dirt Douglas, Wyoming 1974 CAT 613 [195382] 1974 CAT 613 MR Dirt Douglas, Wyoming 1974 CAT D6C [195377] 1974 CAT D6C MR Dirt Douglas, Wyoming 1999 CAT D6R XL [195362] 1999 CAT D6R XL MR Dirt Douglas, Wyoming