While Johnson Smith was the most prefered novelty catalog in the US (hosting Humanatone and Magic Flute ads), Ellisdon's was its equivalent in the UK.
Ellisdon's catalog cover in the 1930/40's and the 1950's:
Another interesting point is the texts are absolutely the same, excepted for one sentence that does not exist anymore in the 1950's version: « It is made entirely of metal ». Since the modification did not gain a line of text (it's not a typo/lay out need), what is the reason of this correction? Wasn't the 1950's Magic Nose Flute made in metal? Again, we remember that the Humanaphone was *also* the first plastic nose flute. Did Ellisdon's propose a plastic Magic Nose Flute?
[EDIT]: Indeed! Our friend and reader Steven Parkes confirmed his "Ellisdon's" nose flute from 1950's was... a Schwan!
The same advertisement — with a renewed presentation text however — is continuously used in the 1960's. Then the ad disappeared.
Here on the back page of the comics Marvelman #3 (1959) and in the 1965 Ellisdon's catalog: