How do you tell mammoth Holtons from 4/4 (quasi York 33)? They are proportioned almost exactly the same, so if you can't see fat wraps on the back it's hard. Think this one is the 4/4.
If someone asked or wanted, I could see if the seller would let me try it out, an I could report back, condition, tone, valves, dents...a review, retired and about an hour away.
Blessings,
1909 Martin Eb, Old US Navy Horn
1909 Martin Euphonium, Old US Navy Horn
St. Pete Eb