ve ▁well ▁behind ▁the ▁val ve ▁plate ▁that ▁was ▁sc rew ed ▁onto ▁the ▁val ve ▁ch est ▁with ▁white ▁se aling ▁comp ound . ▁ ▁The ▁Stra ube ▁Style ▁L ▁was ▁a ▁short ▁u pr ight ▁– ▁only ▁ 3   ft ▁ 7 ▁inches ▁tall , ▁introduced ▁in ▁ 1 9 2 6 ▁– ▁that ▁incorpor ated ▁Stra ube ' s ▁pat ented ▁Du plex ▁Over string ing . ▁Stra ube ▁claimed ▁that ▁the ▁Du plex ▁Over string ing ▁enabled ▁the ▁piano ▁to ▁produce ▁the ▁sound ▁of ▁a ▁full ▁u pr ight . ▁ ▁The ▁Mel o - H arp ▁was ▁a ▁pat ented ▁p neum atic - control led ▁attachment ▁for ▁Stra ube ▁pian os . ▁ ▁The ▁Stra ube ▁Gr ands ▁offered ▁in ▁ 1 9 2 7 ▁included ▁lengths ▁four - foot - four , ▁five - foot - two , ▁six - foot , ▁and ▁six - foot - two ▁in ▁various ▁styles . ▁ ▁Stra ube ▁Re produ cing ▁Gr ands ▁were ▁autom ated ▁player ▁pian os ▁that ▁used ▁a ▁Wel te - M ignon ▁action ▁manufact ured ▁under ▁license ▁by ▁the ▁Auto ▁P neum atic ▁Action ▁Co . ▁of ▁Manh attan , ▁New ▁York . ▁ ▁In ▁ 1 9 2 4 , ▁Stra ube ▁introduced ▁individual ▁names ▁for ▁its ▁players ▁rather ▁than ▁alpha ▁letters ▁in ▁an ▁effort ▁to ▁stim ulate ▁ret ail ▁sales . ▁A ▁year ▁earlier , ▁Stra ube ▁introduced ▁a ▁uniform ▁national ▁pr icing ▁policy . ▁In ▁ 1 9 2 3