the first digger made, google up japenese mueseum of transport and tech .i have 3 of ,using one for parts auction for the isuzu engine see running, or can list a complete machine running cond if int.this one is chain drive tracks others have drive motors on tracks, no oil leaks 8 ton , this one is in working cond,not good at running marathons, be good in a sand pit or scrap yard will drive onto a loader ok, shame to wreck it track rollers are good, rams new seals , new srarter no batteries with it, starts on 2 car batteries ok