I tried to break down the horns by feature, so they're consistent across the King, New King, and Toneking models

Untitled Document
Graslitz Nauheim
1. Split bell keys 5. Left bell keys, soldered toneholes
2. Left bell keys, wire keyguards 6. Right bell keys, drawn and rolled toneholes
3. Right bell keys, wire keyguards 7. Plexiglas/"Angel Wing" keyguard
4. Right bell keys, sheet metal keyguards 8. Right bell keys, sheet metal keyguards
 

1. Split Bell Keys
3. Right Bell Keys, Wire Keyguards
4. Right Bell Keys, Sheet Metal Keyguards
4. Right Bell Keys, Sheet Metal Keyguards
from Tuesday 10 June 2014 to Friday 16 June 2017
7.  Plexiglas Keyguards
7. Plexiglas Keyguards
... 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.
Saturday 1 January 2000
8.  Sheet Metal Keyguards