Keller of Stuttgart piano actions

[scandoboy]

Does anyone know anything about Keller piano actions from before world war 2? I bought an old Rönisch upright from the 1930's and the action is made by Keller. It plays like a dream so I'm interested as to what became of them. There's almost no information on the Internet. I assume they were some sort of contemporary of Renner as both companies were in Stuttgart.

[silverwoodpianos]

Keller & Co J. Mechanics
Stuttgart, Germany * 1857 +1947
Formed. according to Heslach, 1874
Stuttgart verlegt.1929
* Langer-Keller-Koehler,
Mechanical industry. from 1947
ads as
Stuttgart Mechanics Manufacturing
GmbH

[scandoboy]

Thanks for that. Does that mean Keller and Langer joined together after the 2nd World war? Or are Keller and Langer actions the same?

[silverwoodpianos]

I would have to look at the action from that time period to determine if they were identical.

Following that period of time much of the infrastructure would have been non-existent. Many of the firms may have joined together in the only usable space available to begin production once again as Germany rebuilt.

I know that Bechstein and Blüthner shared the same factory for a while, if I recall correctly or perhaps it was Förster and someone else.