9 4 0 . ▁▁ ▁World ▁War ▁II ▁S omet ime ▁before ▁May ▁ 1 2 , ▁ 1 9 4 2 , ▁the ▁U . S . ▁War ▁Production ▁Board ▁restricted ▁piano ▁production ▁by ▁C . G . ▁Con n , ▁Ltd ., ▁to ▁ 1 2 0 ▁pian os ▁a ▁month . ▁On ▁May ▁ 1 2 , ▁ 1 9 4 2 , ▁C . G . ▁Con n , ▁Ltd ., ▁announced ▁that ▁it ▁would ▁cons olid ate ▁its ▁piano ▁manufact uring ▁by ▁moving ▁its ▁Stra ube ▁manufact uring ▁from ▁Chicago ▁He ights ▁to ▁its ▁H add or ff ▁P iano ▁manufact uring ▁plant ▁in ▁Rock ford , ▁Illinois , ▁at ▁Rail road ▁Avenue ▁and ▁ 9 th ▁Street — a ▁le ased ▁facility ▁that ▁H add or ff ▁shared ▁with ▁the ▁Rock ford ▁Chair ▁and ▁F urn iture ▁Company . ▁H add or ff ▁had ▁sold ▁its ▁original ▁Rock ford ▁plant ▁on ▁Harrison ▁Avenue ▁in ▁ 1 9 4 0 . ▁In ▁December ▁ 1 9 4 0 , ▁a ▁month ▁after ▁C . G . ▁Con n ' s ▁ac quisition ▁of ▁the ▁H add or ff ▁P iano ▁Company , ▁Con n ▁moved ▁the ▁H add or ff ' s ▁manufact uring ▁operations ▁into ▁the ▁Rail road ▁Avenue ▁plant , ▁which ▁it ▁had ▁modern ized . ▁ ▁On ▁May ▁ 3 0 , ▁ 1 9 4 2 ▁– ▁a ▁few ▁weeks ▁after ▁C . G . ▁Con n ▁cons olid ated ▁the ▁manufact uring ▁of