Steinway in Queens, NY, and Steinway in Hamburg, Germany.
It was two branches of the family that ran them, and got separated by the war.
Before they unified, they did do cultural exchanges of techniques, methods, etc.
Today they are one company, but the pianos they produce have individual characteristics owing to distinctive methods, techniques, and materials used by each factory.
During the war, Steinway Hamburg was also forced to become an arms factory, so there are German weapons out there made from tonewood that would have been great pianos
https://www.chuppspianos.com/steinway-sons-pianos/history/
I think it's one of the great cultural integration stories, that people can get separated and come back together even after war and terror.