Found this in a box of old magazines:
and from the article "Tootin' for Fun" about Rotarian sponsored bands:
(not to full size.)
Nice 1940 Helicon picture (and more)
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David Richoux
- 5 valves
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windshieldbug
- Once got the "hand" as a cue
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Re: Nice 1940 Helicon picture (and more)
But those aren't rotaries... they're piston horns! 
Instead of talking to your plants, if you yelled at them would they still grow, but only to be troubled and insecure?