Eb Alto 265777
6M Eb Alto 260020 A
American Makes & Models / Conn / Standard - aka Naked Lady / 6M Eb Alto 260020 A
From intofoc.usmontreal on ebay 264404437992

This horn is interesting for a couple reasons. First, note the "New York Style" neck. The underslung octave key was far more common on these horns. Second, there's an "A" after the serial number. This generally means "mis-stamped serial number," so there may be another 260020 horn out there. Finally, this is a very early Artist horn, or, if you prefer, very late Transitional horn.
Eb Alto 340xxx
American Makes & Models / HN White - King / Zephyr / Eb Alto 340xxx
From dorothy_and_valtons_white_house on ebay 132484877411