Am I imagining this 'harmonica'?

[goingdownslow]

In the '60s I recall seeing adverts for a harmonica, but instead of the row of holes it had three mouth pieces on. I think it was for playing 12 bar blues on, but again I might be making that up. I have never seen or heard of it since, and over the years have mentioned it but no one recalls it, until yesterday when a friend of mine described seeing the same thing.
I have googled all sorts of terms but have come up with nothing. Did we both imagine it?
A very rough sketch is something like this....

[2pods]

I could be wrong, but it looks like the other side, where the sound/air comes out.

[goingdownslow]

Found what I was imagining... 

[2pods]

Bugger me !

 

That is very unusual.

Wonder what it sounds/plays like ?

[goingdownslow]

52 minutes ago, 2pods said:

Bugger me !

 

That is very unusual.

Wonder what it sounds/plays like ?

 

[Richard R]

Well that's not something you see every day!

[Stub Mandrel]

I have a Honhner Vineta. 

 

48 holes

 

Everywhere will tell you it plays three chords F, C, G.

 

It also plays the root notes as bass tones (two reeds).

 

On 'suck' you get the fifths so (I think) the chords C7, G7, D7.

 

99% of web sources don't realise this.

[Stub Mandrel]

 

 

[Richard R]

So, am I right in thinking that to play @Stub Mandrel's harmonica you need to learn by ear where to put your mouth (if you see what I mean!) and on the one @goingdownslow was searching for you have defined places to make it simpler?

 

The same concept as fretless and fretted?

 

Edited January 14 by Richard R
Typo

[Stub Mandrel]

It's hard to play. Not getting your gob in the right part of the iron, but having enough puff!

[Jean-Luc Pickguard]

That R&B one is quite an ingenious bit of kit. Probably not very versatile though.