0 8 , ▁Hold en ▁& ▁F rost ▁moved ▁into ▁the ▁business ▁of ▁minor ▁rep airs ▁to ▁car ▁u ph ol st ery . ▁The ▁company ▁began ▁to ▁re - body ▁older ▁ch ass is ▁using ▁motor ▁bodies ▁produced ▁by ▁F ▁T ▁H ack ▁and ▁Co ▁from ▁ 1 9 1 4 . ▁Hold en ▁& ▁F rost ▁mounted ▁the ▁body , ▁and ▁painted ▁and ▁trim med ▁it . ▁The ▁company ▁began ▁to ▁produce ▁complete ▁motor cycle ▁side car ▁bodies ▁after ▁ 1 9 1 3 . ▁After ▁ 1 9 1 7 , ▁w art ime ▁trade ▁restrictions ▁led ▁the ▁company ▁to ▁start ▁full - scale ▁production ▁of ▁vehicle ▁body ▁shell s . ▁H . J . ▁Hold en ▁founded ▁a ▁new ▁company ▁in ▁late ▁ 1 9 1 7 , ▁and ▁registered ▁Hold en ' s ▁Motor ▁Body ▁Build ers ▁Ltd ▁( H MB B ) ▁on ▁ 2 5 ▁February ▁ 1 9 1 9 , ▁special ising ▁in ▁car ▁bodies ▁and ▁using ▁the ▁former ▁F ▁T ▁H ack ▁& ▁Co ▁facility ▁at ▁ 4 0 0 ▁King ▁William ▁Street ▁in ▁Ad ela ide ▁before ▁ere ct ing ▁a ▁large ▁four - story ▁factory ▁on ▁the ▁site . ▁ ▁By ▁ 1 9 2 3 , ▁H MB B ▁were ▁producing ▁ 1 2 , 0 0 0   un its ▁per ▁year . ▁During ▁this ▁time , ▁H MB B ▁assemble d ▁bodies ▁for ▁Ford ▁Motor ▁Company ▁of ▁Australia ▁until ▁its ▁Ge el ong ▁plant ▁was ▁completed . ▁From