▁tracks ▁for ▁use ▁with ▁tra ctors ▁and ▁he ▁registered ▁" C ater p ill ar " ▁as ▁a ▁tra dem ark ▁in ▁ 1 9 1 0 . ▁Since ▁Hol t ▁had ▁tra dem ark ed ▁C ater p ill ar , ▁Best ▁named ▁his ▁tra ctors ▁Track layers . ▁In ▁ 1 9 1 1 , ▁Hol t ▁began ▁building ▁the ▁" H olt ▁Model ▁ 6 0 ▁C ater p ill ar " ▁in ▁its ▁Stock ton ▁plant ▁and ▁a ▁" H olt ▁Model ▁ 4 0 - 6 0 ▁C ater p ill ar " ▁at ▁its ▁East ▁Pe oria ▁factory . ▁Add itional ▁models ▁followed , ▁including ▁the ▁" H olt ▁Model ▁ 6 0 - 7 5 ▁C ater p ill ar ", ▁which ▁sold ▁very ▁well , ▁eventually ▁renamed ▁as ▁the ▁" H olt ▁Model ▁ 7 5 ▁C ater p ill ar ", ▁their ▁best - s elling ▁front ▁till er - w he e led ▁tra ctor . ▁ ▁New ▁Best ▁compet itor ▁re - emer ges ▁▁ ▁In ▁ 1 9 1 0 , ▁Daniel ▁Best ' s ▁son ▁C . ▁L . ▁Best ▁left ▁the ▁Hol t ▁Man ufact uring ▁Company ▁where ▁he ▁had ▁been ▁general ▁manager ▁and ▁re - est ab lished ▁his ▁father ' s ▁company ▁under ▁the ▁name ▁C .   L .   Best ▁Gas ▁Tra ction ▁Co . ▁in ▁El m h urst , ▁near ▁San ▁Le andro , ▁California . ▁Hol t ▁immediately ▁su ed , ▁claim