According to this SOTW thread, the Studium model was produced by Dolnet and several other manufacturers. I agree that the horns pictured are Weltklangs with a couple tweaks.
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Bb Tenor Serial # ?
Paĝo kreita en 0.041 s (23 SQL peto en 0.024 s) -
Potencigita per Piwigo
If you want to change how many album pictures per page, use CTRL+ and CTRL- (Command + and Command - if you have a Mac). 80% looks great on my 4K monitor.