Peter Johnson explained on 23/04/2018 :
Two questions:
1) What would be the likely effect of my 12v chimes receiving 24v?
2) Wouldn't it be possible to put a resistor in the circuit so the
chimes get 12v? (I guess that if the answer was yes the Ring would
provide one but I'd be interested in knowing what the team thinks.)

If the two are the same and just electro-mechanical rather than
electronic, then adapting them to series connection should be OK - If I
understand the question?