Oscar Ullmann Posaunen

[samtbrn]

Hello Enrico Mario and the Markneukirchen Museum.
I am currently doing research into the brass instrument builder Oscar Ullmann from Leipzig. His contemporaries of the time, like Robert Schopper (also Leipzig) produced advertisment catalogues of their instrument range, around the turn of the century 1890 - 1920 and later towards the 2nd world war. I am trying to find such a catalogue produced by the Ullmann company and was wondering if one such might exist in the collection at the museum? I am trying to find also a timeline of when each instrument was built. Dating back to his father's work with Penzel, all instruments are marked with a serial number, but none of my colleagues that I have spoken to can exactly place these numbers. I have read on this forum, that you may have some more insight into the numbers and in which years they were built.

Any help furthering this research would be welcome.
Best
Sam