▁were ▁nick named ▁D read n ought s , ▁after ▁a ▁powerful ▁British ▁war ship ▁of ▁the ▁day , ▁the ▁Sydney ▁press ▁referred ▁to ▁them ▁as ▁Toast ra cks ▁as ▁all ▁the ▁seats ▁were ▁trans verse ▁or ▁cross ben ch . ▁ ▁Between ▁ 1 9 1 8 ▁and ▁ 1 9 4 6 , ▁eleven ▁( 8 5 5 , ▁ 9 3 5 , ▁ 9 4 3 , ▁ 1 0 0 7 , ▁ 1 0 8 9 , ▁ 1 1 7 0 , ▁ 1 2 4 1 , ▁ 1 3 7 2 , ▁ 1 3 8 3 ▁and ▁ 1 4 5 1 ) ▁were ▁re built ▁to ▁res emble ▁the ▁P ▁class ▁tr ams ▁when ▁heavy ▁body ▁rep airs ▁were ▁required ▁and ▁rec lass ified ▁as ▁the ▁O / P ▁class . ▁The ▁last ▁was ▁with dra wn ▁in ▁ 1 9 5 8 . ▁ ▁Design ▁The ▁O - class ▁tram ▁has ▁a ▁combination ▁of ▁en closed ▁and ▁open ▁sections . ▁Lad ies ▁would ▁generally ▁sit ▁in ▁the ▁en closed ▁compart ments , ▁while ▁gentlemen ▁sat ▁in ▁the ▁open ▁compart ments . ▁In ▁the ▁centre ▁are ▁the ▁four ▁closed ▁sections , ▁accessible ▁to ▁the ▁street ▁via ▁sl iding ▁doors ▁and ▁fitted ▁with ▁cross ▁ben ch ▁tim ber ▁seats . ▁On ▁either ▁side ▁of ▁these ▁are ▁the ▁two ▁open ▁compart ments , ▁each ▁fitted ▁with ▁two ▁facing ▁cross ▁ben ch ▁seats ▁with ▁metal ▁arm rest s . ▁These ▁two ▁sections ▁have ▁pull -