... and sopranos from the same era ...
Note that most baris from this era only have the left side Plexiglas keyguard, but sheet metal right-side guards.
I have seen a couple that do have the right side "angel wing," but that's uncommon.

Alto (1955)
Alto 28579
Alto 29449
Alto 29449
Tuesday 27 September 2011
Bb Tenor 34081 (1959) - Modell The New King
Bb Tenor 34081 (1959) - Modell The New King
Froim boplover on ebay
Silver plate

No, I don't know why this horn is also engraved "Modell The New King."
I thought it was interesting, so I glommed the photos.
The left keyguard is not original.
Tenor 22XXX
Tenor 25300