What I ended up with is a Century 76H- .522, narrow slide, 8.5" bell. What a strange horn! Seems to play well enough, just mystified as to what it's for. Excited to get the slide worked on and some dings taken out.
Almost more interesting is this "The Olds," dating to 1937. .485/.500 dual bore, 7" bell, friction fit with no slide lock. Still an amazing slide and quite the shouter!
Also got a Blessing Scholastic, but... who cares.
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