PW
something that's been reported by many media magazines of repute over the years, Stern was one for example, but probably not public knowledges was the configuration of the OZ mustering bell 47's cyclic buttons.
Intercom used be the red one on top like the 206, but was always unreliable so was disused and separate PTT buttons would be located around the cab with a hot mike switch on the console.
In front of the grip was the normal red radio Transmit trigger, and usually two pull toggles mounted on a frame attached to the cyclic below the hand grip, one for Hook release the other for the Siren, which had a mode selector on the siren itself, (six modes and voice select also) which was located behind your feet in front of the seat.
The old unreliable intercom buttom used to be connected to a jigger, the same as an electric cattle prod, arrangement that was used to prod particularly slow cattle via a long probe that stuck out in front from under the chin of the cabin.
Many had tape decks which were tapped into the intercom circuit so's one could listen to your favorite music during the long days.
One dude had his tape deck hot wired to his siren speaker and often played 'Ride of the Valkaries', much to the amusement of assembled horsemen.