The AHM Big Boy 4-8-8-4 ( 4009)steam engine in HO scale.This model was manufactured in 2002 .It has  a smoke unit installed which is after market retrofit by previous owner.The engine has been professionally cleaned,lubricated all moving parts,all driving arms bolts checked and tightened.It is a complete unit with bell,front number plates,cab and tender handrails and ladders at the lower corners of tender.Forward/reverse movements,smoke unit and headlights are tested and verified to be working well.Please view the video.It is DC model and not DCC.It will be shipped professionally packed to prevent in transit damage.22" radius track is recommended