Very cool! That engraving looks just like what's on my Holton monster Eb bell. Dan Schultz is working on a Holton raincatcher that is the same year of manufacture as mine also. If I had any cash I could buy both and have three matched engravings!
The helicon:
Dan's raincatcher:
Mine:
Jordan
King 2341 with a Holton "Monster" Eb bell
Eb Frankentuba
Martin Medium Eb Helicon
If at first you don't succeed, skydiving's probably not for you.