The only thing I can think of is the word "rotary". There are rotary engines and old rotary phones that had dials....hope this helps.
I think it was the rotary phone
They all weigh 3lb.
It was called a "rotary dial".
yes!
Rotary is used to describe something that has the capability of rotation.
There are many places an individual could purchase a retro corded phone with a rotary dial. A few of the more commonly used places are Amazon, Retro Planet and eBay.
used in hairdressing
The rotary dial phone used a wheel to dial a sequence of numbers. It went into use as early as the 1890s to overcome the need for an operator to connect all calls. The rotary dial remained in use until the 1980s and beyond.. Even today, many telephone exchanges still support the rotary dial signalling.
A rotary system can be used to calibrate flowmeters. Unless you are refering to a rotary telephone system, in which that works differently.
spring type rotary compressor
Rotary and Induction