Hi,
Here's a bit of historical reading ( in fact, a very early testimonial from the fall of 1937 ) talking about AGA Baltic testing out the new Shearer Horn system ( at the Palladium Cinema in Stockholm ) .
The article is in Swedish so one needs to use Google translate ( or similar ) .
( Click a pic ) ;
Some more reading from LHF showing an actual 1950's AGA Baltic driver ( for the above systems ) .
Fascinating stuff this ( at least to me ).
From the looks of it / AGA copied Stephens Trusonic or RCA ( more so than Lansing ) .
PS: ( here's horn info that was finally identified as an Italian maker of Cinema equipment > CINEMECCANICA )
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