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.

  • Eb Alto Serial # ? Eb Alto Serial # ?
  • Bb Tenor Serial # ? Bb Tenor Serial # ?
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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.