Identify this accordion and odd treble controls

[Beemer]

I would like to know the brand of this players accordion. Also if you look carefully you can see additional treble register controls. What are these for?

 

[Dingo40]

Hi Beemer,
This is definitely a Giulietti from the mid to late 1960s, possibly made by Zero Sette.
Their model numbers were determined by the number of treble couplers followed by the number of base couplers, so this could be an 117, but may be a 127 (which I know actually exists).
I don't know anything about the apparently extra black treble-side switches
I'm sure JimD will set us right .

 

[Siegmund]

The 'extras' look more like knobs for electronics, than register or sordino type switches, to me. (Not that I see any evidence of microphones...but there are plenty of old instruments where the internal mics are never used anymore.)

 

[JIM D.]

These knobs were the norm at the time used for control of the crystal mic's installed .

 

[Beemer]

Thanks to you all for the clarification.
Ian