micky wrote:

I first saw a touch-tone phone at a farm show in 1957.

I still have a slim-line touch tone phone in my shop. Looks just like
this...

https://img0.etsystatic.com/035/0/79...69908_ohh8.jpg

I don't use it very often anymore, in fact we hardly use our land line for
much other than taking messages from robocallers. I will call out on the
landline if I know I will be on hold for a while. No sense using up minutes
on my cell listening to lousy music. We have a cordless set so I can still
get stuff done while on hold.