down ▁canvas ▁bl inds ▁to ▁protect ▁passengers ▁against ▁the ▁elements . ▁En closed ▁driver ' s ▁compart ments ▁at ▁each ▁end ▁are ▁joined ▁to ▁the ▁open ▁compart ments . ▁ ▁Service ▁The ▁O - class ▁tram c ars ▁were ▁the ▁back bone ▁of ▁the ▁Sydney ▁fleet ▁for ▁ 4 0 ▁years ▁and ▁saw ▁service ▁on ▁all ▁the ▁Sydney ▁elect r ified ▁lines ▁at ▁various ▁periods ▁and ▁were ▁loved ▁by ▁both ▁passengers ▁and ▁tram ▁cre ws . ▁They ▁were ▁especially ▁su ited ▁to ▁ven ues ▁such ▁as ▁race ▁meet ings , ▁sport ing ▁matches ▁and ▁the ▁Royal ▁E aster ▁Show ▁as ▁they ▁could ▁be ▁em pt ied ▁and ▁filled ▁quickly ▁by ▁means ▁of ▁the ▁numerous ▁door ways . ▁ ▁Pres ervation ▁ ▁Six ▁have ▁been ▁preserved : ▁ 8 0 5 ▁owned ▁by ▁Power house ▁Museum ▁on ▁loan ▁to ▁Sydney ▁Tr am way ▁Museum ▁ 1 1 1 1 ▁and ▁ 1 4 1 s ▁( Bre ak down ▁tram ▁conversion , ▁formerly ▁ 1 0 3 0 ) ▁in ▁oper ational ▁condition ▁at ▁the ▁Sydney ▁Tr am way ▁Museum ▁▁ 9 5 7 ▁and ▁ 1 0 8 9 ▁( as ▁O / P ▁configuration ) ▁under ▁rest oration ▁at ▁the ▁Sydney ▁Tr am way ▁Museum ▁▁ 1 1 8 7 ▁at ▁the ▁Oregon ▁Electric ▁Railway ▁Museum ▁ ▁References ▁ ▁Further ▁reading ▁ ▁External ▁links ▁ ▁Category : Tr ams ▁in ▁Sydney ▁Category : Tr am ▁vehicles ▁of ▁Australia <0x0A> </s> ▁B own ▁is ▁a ▁surname . ▁Notable ▁people ▁with ▁the ▁surname ▁include